S-1135 Series
www.sii-ic.com
HIGH RIPPLE-REJECTION LOW DROPOUT
MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
© Seiko Instruments Inc., 2008-2010 Rev.2.0_00
Seiko Instruments Inc. 1
S-1135 Series, developed using the CMOS technology, is a positive voltage regulator IC which has the low dropout voltage,
the high-accuracy output voltage and the low current consumption (300 mA output current).
A 1.0 μF small ceramic capacitor can be used. It operates with low current consumption of 45 μA typ.
The overcurrent protection circuit prevents the load current from exceeding the capacitance of output transistor. The
power-off circuit ensures longer battery life.
Various capacitors, also small ceramic capacitors, can be used for this IC more than for the conventional regulator ICs
which have CMOS technology.
Furthermore a small SOT-89-5, SOT-23-5, and HSNT-6A packages realize high-density mounting.
Features
Output voltage: 1.0 V to 3.5 V, selectable in 0.05 V step.
Low equivalent series resistance capacitor : Ceramic capacitor of 1.0 μF or more can be used as the I/O capacitor.
Wide input voltage range: 1.5 V to 5.5 V
High-accuracy output voltage: ±1.0% (1.0 V to 1.45 V output product : ±15 mV)
Low dropout voltage: 160 mV typ. (products having the output of 2.6 V, IOUT = 300 mA)
Low current consumption: During operation: 45 μA typ., 65 μA max.
During power-off: 0.1 μA typ., 1.0 μA max.
Output current: Possible to output 300 mA (at VIN VOUT(S) + 1.0 V)*1
High ripple rejection: 70 dB typ. (at 1.0 kHz, VOUT = 1.0 V)
Built-in overcurrent protection circuit: limits overcurrent of output transistor
Built-in power-off circuit: Ensures long battery life.
Discharge shunt circuit can be selected.
Resistor is selectable in pull-up or pull-down
Lead-free, Sn 100%, halogen-free*2
*1. Attention should be paid to the power dissipation of the package when the out put current is large.
*2. Refer to “ Product Name Structure” for details.
Applications
Power supply for battery-powered devices
Power supply for cellular phones
Power supply for portable equipment
Packages
SOT-89-5
SOT-23-5
HSNT-6A
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
2
Block Diagrams
1. S-1135 Series A type
Function Status
ON / OFF logic Active “H”
Discharge shunt
function Available
Pull-up resistor None
Pull-down resistor Available
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Power-off
circuit
Reference
voltage circuit
+
*1
*1
*1. Parasitic diode
Figure 1
2. S-1135 Series B type
Function Status
ON / OFF logic Active “H”
Discharge shunt
function Available
Pull-up resistor None
Pull-down resistor None
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Reference
voltage circuit
+
*1
*1
Power-off
circuit
*1. Parasitic diode
Figure 2
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 3
3. S-1135 Series C type
Function Status
ON / OFF logic Active “H”
Discharge shunt
function None
Pull-up resistor None
Pull-down resistor Available
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Reference
voltage circuit
+
*1
Power-off
circuit
*1. Parasitic diode
Figure 3
4. S-1135 Series D type
Function Status
ON / OFF logic Active “H”
Discharge shunt
function None
Pull-up resistor None
Pull-down resistor None
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Reference
voltage circuit
+
*1
Power-off
circuit
*1. Parasitic diode
Figure 4
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
4
5. S-1135 Series E type
Function Status
ON / OFF logic Active “L”
Discharge shunt
function Available
Pull-up resistor Available
Pull-down resistor None
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Reference
voltage circuit
+
*1
*1
Power-off
circuit
*1. Parasitic diode
Figure 5
6. S-1135 Series F type
Function Status
ON / OFF logic Active “L”
Discharge shunt
function Available
Pull-up resistor None
Pull-down resistor None
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Reference
voltage circuit
+
*1
*1
Power-off
circuit
*1. Parasitic diode
Figure 6
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 5
7. S-1135 Series G type
Function Status
ON / OFF logic Active “L”
Discharge shunt
function None
Pull-up resistor Available
Pull-down resistor None
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Reference
voltage circuit
+
*1
Power-off
circuit
*1. Parasitic diode
Figure 7
8. S-1135 Series H type
Function Status
ON / OFF logic Active “L”
Discharge shunt
function None
Pull-up resistor None
Pull-down resistor None
VSS
ON / OFF
VIN VOUT
Overcurrent
protection circuit
Reference
voltage circuit
+
*1
Power-off
circuit
*1. Parasitic diode
Figure 8
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
6
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1135 Series. Refer to Refer to “1.
Product name” regarding the contents of product name, “2. Function list of product type” regarding the product
type, “3. Package” regarding the package drawings.
1. Product name
(1) SOT-89-5
S-1135 x xx U5T1 x
Out put vol tage*2
10 to 35
(e.g., when the output voltage is 1.0 V, it i s expr essed as 10.)
Environmental code
U : Lead-free (Sn 100%), hal ogen-fr ee
G : Lead-free (for details, pl ease contact our sal es office)
Product t ype*3
A to H
Package abbr eviat i on and I C packing specifi cat i ons *1
U5T1: SOT- 89- 5, tape product
*1. Refer to the tape specifications.
*2. If you request the product which has 0.05 V step, contact our sales office.
*3. Refer to “2. Function list of product type”.
(2) SOT-23-5, HSNT-6A
S-1135 x xx xxxx x
Out put vol tage*2
10 to 35
(e.g., when the output voltage is 1.0 V, it i s expr essed as 10.)
Environmental code
U : Lead-fr ee ( Sn 100%) , hal ogen-fr ee
S : Lead-fr ee, halogen-free
Product t ype*3
A to H
Package abbr eviat i on and I C packing specific at i ons *1
M5T1: SOT- 23-5, tape product
A6T1: HSNT-6A, tape product
*1. Refer to the tape specifications.
*2. If you request the product which has 0.05 V step, contact our sales office.
*3. Refer to “2. Function list of product type”.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 7
2. Function list of product type
Table 1
Product Type
ON / OFF Logic Discharge Shunt Function Pull-up Resistor Pull-down Resistor
A Active high Available None Available
B Active high Available None None
C Active high None None Available
D Active high None None None
E Active low Available Available None
F Active low Available None None
G Active low None Available None
H Active low None None None
3. Package
Drawing Code
Package Name Package Tape Reel Land Stencil Opening
SOT-89-5 UP005-A-P-SD UP005-A-C-SD UP005-A-R-SD
SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD
HSNT-6A PJ006-A-P-SD PJ006-A-C-SD PJ006-A-R-SD PJ006-A-LM-SD PJ006-A-LM-SD
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
8
4. Product name list
4. 1 S-1135 series A typ e
ON / OFF logic: Active high Pull-up resistor: None
Discharge shunt function: Available Pull-down resistor: Available
Table 2
Output Voltage SOT-89-5 SOT-23-5 HSNT-6A
1.0 V ±15 mV S-1135A10-U5T1x S-1135A10-M5T1y S-1135A10-A6T1y
1.1 V ±15 mV S-1135A11-U5T1x S-1135A11-M5T1y S-1135A11-A6T1y
1.2 V ±15 mV S-1135A12-U5T1x S-1135A12-M5T1y S-1135A12-A6T1y
1.3 V ±15 mV S-1135A13-U5T1x S-1135A13-M5T1y S-1135A13-A6T1y
1.4 V ±15 mV S-1135A14-U5T1x S-1135A14-M5T1y S-1135A14-A6T1y
1.5 V ±1.0% S-1135A15-U5T1x S-1135A15-M5T1y S-1135A15-A6T1y
1.6 V ±1.0% S-1135A16-U5T1x S-1135A16-M5T1y S-1135A16-A6T1y
1.7 V ±1.0% S-1135A17-U5T1x S-1135A17-M5T1y S-1135A17-A6T1y
1.8 V ±1.0% S-1135A18-U5T1x S-1135A18-M5T1y S-1135A18-A6T1y
1.85 V ±1.0% S-1135A1J-U5T1x S-1135A1J-M5T1y S-1135A1J-A6T1y
1.9 V ±1.0% S-1135A19-U5T1x S-1135A19-M5T1y S-1135A19-A6T1y
2.0 V ±1.0% S-1135A20-U5T1x S-1135A20-M5T1y S-1135A20-A6T1y
2.1 V ±1.0% S-1135A21-U5T1x S-1135A21-M5T1y S-1135A21-A6T1y
2.2 V ±1.0% S-1135A22-U5T1x S-1135A22-M5T1y S-1135A22-A6T1y
2.3 V ±1.0% S-1135A23-U5T1x S-1135A23-M5T1y S-1135A23-A6T1y
2.4 V ±1.0% S-1135A24-U5T1x S-1135A24-M5T1y S-1135A24-A6T1y
2.5 V ±1.0% S-1135A25-U5T1x S-1135A25-M5T1y S-1135A25-A6T1y
2.6 V ±1.0% S-1135A26-U5T1x S-1135A26-M5T1y S-1135A26-A6T1y
2.7 V ±1.0% S-1135A27-U5T1x S-1135A27-M5T1y S-1135A27-A6T1y
2.8 V ±1.0% S-1135A28-U5T1x S-1135A28-M5T1y S-1135A28-A6T1y
2.85 V ±1.0% S-1135A2J-U5T1x S-1135A2J-M5T1y S-1135A2J-A6T1y
2.9 V ±1.0% S-1135A29-U5T1x S-1135A29-M5T1y S-1135A29-A6T1y
3.0 V ±1.0% S-1135A30-U5T1x S-1135A30-M5T1y S-1135A30-A6T1y
3.1 V ±1.0% S-1135A31-U5T1x S-1135A31-M5T1y S-1135A31-A6T1y
3.2 V ±1.0% S-1135A32-U5T1x S-1135A32-M5T1y S-1135A32-A6T1y
3.3 V ±1.0% S-1135A33-U5T1x S-1135A33-M5T1y S-1135A33-A6T1y
3.4 V ±1.0% S-1135A34-U5T1x S-1135A34-M5T1y S-1135A34-A6T1y
3.5 V ±1.0% S-1135A35-U5T1x S-1135A35-M5T1y S-1135A35-A6T1y
Remark 1. Please contact our sales office for products with specifications other than the above.
2. x: G or U
y: S or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 9
4. 2 S-1135 series B type
ON / OFF logic: Active high Pull-up resistor: None
Discharge shunt function: Available Pull-down resistor: None
Table 3
Output Voltage SOT-89-5 SOT-23-5 HSNT-6A
1.0 V ±15 mV S-1135B10-U5T1x S-1135B10-M5T1y S-1135B10-A6T1y
1.1 V ±15 mV S-1135B11-U5T1x S-1135B11-M5T1y S-1135B11-A6T1y
1.2 V ±15 mV S-1135B12-U5T1x S-1135B12-M5T1y S-1135B12-A6T1y
1.3 V ±15 mV S-1135B13-U5T1x S-1135B13-M5T1y S-1135B13-A6T1y
1.4 V ±15 mV S-1135B14-U5T1x S-1135B14-M5T1y S-1135B14-A6T1y
1.5 V ±1.0% S-1135B15-U5T1x S-1135B15-M5T1y S-1135B15-A6T1y
1.6 V ±1.0% S-1135B16-U5T1x S-1135B16-M5T1y S-1135B16-A6T1y
1.7 V ±1.0% S-1135B17-U5T1x S-1135B17-M5T1y S-1135B17-A6T1y
1.8 V ±1.0% S-1135B18-U5T1x S-1135B18-M5T1y S-1135B18-A6T1y
1.85 V ±1.0% S-1135B1J-U5T1x S-1135B1J-M5T1y S-1135B1J-A6T1y
1.9 V ±1.0% S-1135B19-U5T1x S-1135B19-M5T1y S-1135B19-A6T1y
2.0 V ±1.0% S-1135B20-U5T1x S-1135B20-M5T1y S-1135B20-A6T1y
2.1 V ±1.0% S-1135B21-U5T1x S-1135B21-M5T1y S-1135B21-A6T1y
2.2 V ±1.0% S-1135B22-U5T1x S-1135B22-M5T1y S-1135B22-A6T1y
2.3 V ±1.0% S-1135B23-U5T1x S-1135B23-M5T1y S-1135B23-A6T1y
2.4 V ±1.0% S-1135B24-U5T1x S-1135B24-M5T1y S-1135B24-A6T1y
2.5 V ±1.0% S-1135B25-U5T1x S-1135B25-M5T1y S-1135B25-A6T1y
2.6 V ±1.0% S-1135B26-U5T1x S-1135B26-M5T1y S-1135B26-A6T1y
2.7 V ±1.0% S-1135B27-U5T1x S-1135B27-M5T1y S-1135B27-A6T1y
2.8 V ±1.0% S-1135B28-U5T1x S-1135B28-M5T1y S-1135B28-A6T1y
2.85 V ±1.0% S-1135B2J-U5T1x S-1135B2J-M5T1y S-1135B2J-A6T1y
2.9 V ±1.0% S-1135B29-U5T1x S-1135B29-M5T1y S-1135B29-A6T1y
3.0 V ±1.0% S-1135B30-U5T1x S-1135B30-M5T1y S-1135B30-A6T1y
3.1 V ±1.0% S-1135B31-U5T1x S-1135B31-M5T1y S-1135B31-A6T1y
3.2 V ±1.0% S-1135B32-U5T1x S-1135B32-M5T1y S-1135B32-A6T1y
3.3 V ±1.0% S-1135B33-U5T1x S-1135B33-M5T1y S-1135B33-A6T1y
3.4 V ±1.0% S-1135B34-U5T1x S-1135B34-M5T1y S-1135B34-A6T1y
3.5 V ±1.0% S-1135B35-U5T1x S-1135B35-M5T1y S-1135B35-A6T1y
Remark 1. Please contact our sales office for products with specifications other than the above.
2. x: G or U
y: S or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
10
4. 3 S-1135 series C type
ON / OFF logic: Active high Pull-up resistor: None
Discharge shunt function: None Pull-down resistor: Available
Table 4
Output Voltage SOT-89-5 SOT-23-5 HSNT-6A
1.0 V ±15 mV S-1135C10-U5T1x S-1135C10-M5T1y S-1135C10-A6T1y
1.1 V ±15 mV S-1135C11-U5T1x S-1135C11-M5T1y S-1135C11-A6T1y
1.2 V ±15 mV S-1135C12-U5T1x S-1135C12-M5T1y S-1135C12-A6T1y
1.3 V ±15 mV S-1135C13-U5T1x S-1135C13-M5T1y S-1135C13-A6T1y
1.4 V ±15 mV S-1135C14-U5T1x S-1135C14-M5T1y S-1135C14-A6T1y
1.5 V ±1.0% S-1135C15-U5T1x S-1135C15-M5T1y S-1135C15-A6T1y
1.6 V ±1.0% S-1135C16-U5T1x S-1135C16-M5T1y S-1135C16-A6T1y
1.7 V ±1.0% S-1135C17-U5T1x S-1135C17-M5T1y S-1135C17-A6T1y
1.8 V ±1.0% S-1135C18-U5T1x S-1135C18-M5T1y S-1135C18-A6T1y
1.85 V ±1.0% S-1135C1J-U5T1x S-1135C1J-M5T1y S-1135C1J-A6T1y
1.9 V ±1.0% S-1135C19-U5T1x S-1135C19-M5T1y S-1135C19-A6T1y
2.0 V ±1.0% S-1135C20-U5T1x S-1135C20-M5T1y S-1135C20-A6T1y
2.1 V ±1.0% S-1135C21-U5T1x S-1135C21-M5T1y S-1135C21-A6T1y
2.2 V ±1.0% S-1135C22-U5T1x S-1135C22-M5T1y S-1135C22-A6T1y
2.3 V ±1.0% S-1135C23-U5T1x S-1135C23-M5T1y S-1135C23-A6T1y
2.4 V ±1.0% S-1135C24-U5T1x S-1135C24-M5T1y S-1135C24-A6T1y
2.5 V ±1.0% S-1135C25-U5T1x S-1135C25-M5T1y S-1135C25-A6T1y
2.6 V ±1.0% S-1135C26-U5T1x S-1135C26-M5T1y S-1135C26-A6T1y
2.7 V ±1.0% S-1135C27-U5T1x S-1135C27-M5T1y S-1135C27-A6T1y
2.8 V ±1.0% S-1135C28-U5T1x S-1135C28-M5T1y S-1135C28-A6T1y
2.85 V ±1.0% S-1135C2J-U5T1x S-1135C2J-M5T1y S-1135C2J-A6T1y
2.9 V ±1.0% S-1135C29-U5T1x S-1135C29-M5T1y S-1135C29-A6T1y
3.0 V ±1.0% S-1135C30-U5T1x S-1135C30-M5T1y S-1135C30-A6T1y
3.1 V ±1.0% S-1135C31-U5T1x S-1135C31-M5T1y S-1135C31-A6T1y
3.2 V ±1.0% S-1135C32-U5T1x S-1135C32-M5T1y S-1135C32-A6T1y
3.3 V ±1.0% S-1135C33-U5T1x S-1135C33-M5T1y S-1135C33-A6T1y
3.4 V ±1.0% S-1135C34-U5T1x S-1135C34-M5T1y S-1135C34-A6T1y
3.5 V ±1.0% S-1135C35-U5T1x S-1135C35-M5T1y S-1135C35-A6T1y
Remark 1. Please contact our sales office for products with specifications other than the above.
2. x: G or U
y: S or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 11
4. 4 S-1135 series D type
ON / OFF logic: Active high Pull-up resistor: None
Discharge shunt function: None Pull-down resistor: None
Table 5
Output Voltage SOT-89-5 SOT-23-5 HSNT-6A
1.0 V ±15 mV S-1135D10-U5T1x S-1135D10-M5T1y S-1135D10-A6T1y
1.1 V ±15 mV S-1135D11-U5T1x S-1135D11-M5T1y S-1135D11-A6T1y
1.2 V ±15 mV S-1135D12-U5T1x S-1135D12-M5T1y S-1135D12-A6T1y
1.3 V ±15 mV S-1135D13-U5T1x S-1135D13-M5T1y S-1135D13-A6T1y
1.4 V ±15 mV S-1135D14-U5T1x S-1135D14-M5T1y S-1135D14-A6T1y
1.5 V ±1.0% S-1135D15-U5T1x S-1135D15-M5T1y S-1135D15-A6T1y
1.6 V ±1.0% S-1135D16-U5T1x S-1135D16-M5T1y S-1135D16-A6T1y
1.7 V ±1.0% S-1135D17-U5T1x S-1135D17-M5T1y S-1135D17-A6T1y
1.8 V ±1.0% S-1135D18-U5T1x S-1135D18-M5T1y S-1135D18-A6T1y
1.85 V ±1.0% S-1135D1J-U5T1x S-1135D1J-M5T1y S-1135D1J-A6T1y
1.9 V ±1.0% S-1135D19-U5T1x S-1135D19-M5T1y S-1135D19-A6T1y
2.0 V ±1.0% S-1135D20-U5T1x S-1135D20-M5T1y S-1135D20-A6T1y
2.1 V ±1.0% S-1135D21-U5T1x S-1135D21-M5T1y S-1135D21-A6T1y
2.2 V ±1.0% S-1135D22-U5T1x S-1135D22-M5T1y S-1135D22-A6T1y
2.3 V ±1.0% S-1135D23-U5T1x S-1135D23-M5T1y S-1135D23-A6T1y
2.4 V ±1.0% S-1135D24-U5T1x S-1135D24-M5T1y S-1135D24-A6T1y
2.5 V ±1.0% S-1135D25-U5T1x S-1135D25-M5T1y S-1135D25-A6T1y
2.6 V ±1.0% S-1135D26-U5T1x S-1135D26-M5T1y S-1135D26-A6T1y
2.7 V ±1.0% S-1135D27-U5T1x S-1135D27-M5T1y S-1135D27-A6T1y
2.8 V ±1.0% S-1135D28-U5T1x S-1135D28-M5T1y S-1135D28-A6T1y
2.85 V ±1.0% S-1135D2J-U5T1x S-1135D2J-M5T1y S-1135D2J-A6T1y
2.9 V ±1.0% S-1135D29-U5T1x S-1135D29-M5T1y S-1135D29-A6T1y
3.0 V ±1.0% S-1135D30-U5T1x S-1135D30-M5T1y S-1135D30-A6T1y
3.1 V ±1.0% S-1135D31-U5T1x S-1135D31-M5T1y S-1135D31-A6T1y
3.2 V ±1.0% S-1135D32-U5T1x S-1135D32-M5T1y S-1135D32-A6T1y
3.3 V ±1.0% S-1135D33-U5T1x S-1135D33-M5T1y S-1135D33-A6T1y
3.4 V ±1.0% S-1135D34-U5T1x S-1135D34-M5T1y S-1135D34-A6T1y
3.5 V ±1.0% S-1135D35-U5T1x S-1135D35-M5T1y S-1135D35-A6T1y
Remark 1. Please contact our sales office for products with specifications other than the above.
2. x: G or U
y: S or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
12
Pin Configuration
Table 6
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VSS GND pin
3 NC*1 No connection
4 ON / OFF ON / OFF pin
5 VIN Input voltage pin
5 4
1 3 2
SOT-89-5
Top vie
w
*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
Figure 9
Table 7
Pin No. Symbol Description
1 VIN Input voltage pin
2 VSS GND pin
3 ON / OFF ON / OFF pin
4 NC*1 No connection
5 VOUT Output voltage pin
5 4
1 3 2
SOT-23-5
Top view
*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
Figure 10
Table 8
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VSS GND pin
3 NC*1 No connection
4 ON / OFF ON / OFF pin
5 NC*1 No connection
6 VIN Input voltage pin
HSNT-6A
Top view
1
2
3 4
6
5
1
2
3
4
6
5
Bottom view
*1. Connect the heatsink of backside
at shadowed area to the board,
and set electric potential open or
GND.
However, do not use it as the
function o f elec trod e.
*1
*1. The NC pin is electrically open.
The NC pin can be connected to VIN or VSS.
Figure 11
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 13
Absolute Maximum Ratings
Table 9 (T a = 25°C unless otherwise specified)
Item Symbol Absolute Maximum Rating Unit
VIN V
SS 0.3 to VSS + 6.0 V
Input voltage VON / OFF V
SS 0.3 to VIN + 0.3 V
Output voltage VOUT V
SS 0.3 to VIN + 0.3 V
SOT-89-5 1000*1 mW
SOT-23-5 600*1 mW
Power dissipation HSNT-6A PD 1000*2 mW
Operating ambient temperature Topr 40 to +85 °C
Storage temperature Tstg 40 to +125 °C
*1. When mounted on board
[Mounted board]
(1) Board size : 114.3 mm × 76.2 mm × t1.6 mm
(2) Name : JEDEC STANDARD51-7
*2. When mounted on board
[Mounted board]
(1) Board size : 50 mm × 50 mm × t1.6 mm
(2) Wiring ratio : 50%
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
0 50 100 150
0
Power Dissipation (PD) [mW]
Ambient Temperature (Ta) [°C]
400
200
600
1000
800
1200
SOT-89-5
HSNT-6A
SOT-23-5
Figure 12 Power Dissipation of Package
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
14
Electrical Characteristics
Table 10 (1 / 2)
(Ta = 25°C unless otherwise specified)
Item Symbol Conditions Min. Typ. Max. Unit
Test
Circuit
1.0 V
V
OUT(S)
< 1.5 V V
OUT(S)
0.015 V
OUT(S)
V
OUT(S)
+
0.015 V 1
Output voltage
*1
V
OUT(E)
V
IN
= V
OUT(S)
+
1.0 V,
I
OUT
= 100 mA 1.5 V
V
OUT(S)
3.5 V V
OUT(S)
×
0.99 V
OUT(S)
V
OUT(S)
×
1.01 V 1
Output current
*2
I
OUT
V
IN
V
OUT(S)
+
1.0 V 300
*5
mA 3
1.0 V
V
OUT(S)
< 1.1 V 0.50 0.61 0.72 V 1
1.1 V
V
OUT(S)
< 1.2 V
0.49 0.61 V 1
1.2 V
V
OUT(S)
< 1.3 V
0.38 0.53 V 1
1.3 V
V
OUT(S)
< 1.4 V
0.31 0.47 V 1
1.4 V
V
OUT(S)
< 1.5 V
0.27 0.41 V 1
1.5 V
V
OUT(S)
< 2.0 V
0.25 0.38 V 1
2.0 V
V
OUT(S)
< 2.6 V
0.21 0.32 V 1
Dropout voltage
*3
V
drop
I
OUT
= 300 mA
2.6 V
V
OUT(S)
3.5 V
0.16 0.26 V 1
1.6 V
V
IN
5.5 V,
I
OUT
= 100 mA 1.0 V
V
OUT(S)
< 1.1 V
0.05 0.2 %/V 1
Line regulation
OUTIN
OUT1
VVV
Δ
Δ
V
OUT(S)
+
0.5 V
V
IN
5.5 V,
I
OUT
= 100 mA 1.1 V
V
OUT(S)
3.5 V
0.05 0.2 %/V 1
1.0 V
V
OUT(S)
2.0 V
15 20 mV 1 V
IN
= V
OUT(S)
+
1.0 V,
1.0 mA
I
OUT
150 mA 2.0 V < V
OUT(S)
3.5 V
15 25 mV 1
1.0 V
V
OUT(S)
3.0 V
30 40 mV 1
Load regulation
Δ
V
OUT2
V
IN
= V
OUT(S)
+
1.0 V,
1.0 mA
I
OUT
300 mA 3.0 V < V
OUT(S)
3.5 V
30 45 mV 1
Output voltage
temperature coefficient
*4
OUT
OUT
VTa
V
Δ
Δ
V
IN
= V
OUT(S)
+
1.0 V, I
OUT
= 100 mA,
40
°
C
Ta
+85
°
C
±
130
ppm/
°
C1
Current consumption
during operation I
SS1
V
IN
= V
OUT(S)
+
1.0 V, ON / OFF pin = ON, no load
45 65
μ
A 2
Current consumption
during power-off I
SS2
V
IN
= V
OUT(S)
+
1.0 V, ON / OFF pin = OFF, no load
0.1 1.0
μ
A 2
Input voltage V
IN
1.5
5.5 V
ON / OFF pin
input voltage “H” V
SH
V
IN
= V
OUT(S)
+
1.0 V, R
L
= 1.0 k
Ω
determined by V
OUT
output level 1.0
V 4
ON / OFF pin
input voltage “L” V
SL
V
IN
= V
OUT(S)
+
1.0 V, R
L
= 1.0 k
Ω
determined by V
OUT
output level
0.3 V 4
B / D / E / F / G / H type
0.1
0.1
μ
A 4 ON / OFF pin
input current “H” I
SH
V
IN
= 5.5 V,
V
ON / OFF
= 5.5 V A / C type 1.0 2.5 5.0
μ
A 4
A / B / C / D / F / H type
0.1
0.1
μ
A 4 ON / OFF pin
input current “L” I
SL
V
IN
= 5.5 V,
V
ON / OFF
= 0 V E / G type 1.0 2.5 5.0
μ
A 4
1.0 V
V
OUT(S)
1.2 V
70
dB 5
Ripple rejection
RR
V
IN
= V
OUT(S)
+
1.0 V,
f = 1.0 kHz,
Δ
V
rip
= 0.5 Vrms,
I
OUT
= 50 mA 1.2 V < V
OUT(S)
3.5 V
65
dB 5
Short-circuit current I
short
V
IN
= V
OUT(S)
+
1.0 V, ON / OFF pin = ON, V
OUT
= 0 V
100
mA 3
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 15
Table 10 (2 / 2)
S-1135 Series A / B / E / F type (With discharge shunt function)
Item Symbol Conditions Min. Typ. Max. Unit
Test
Circuit
“L” output Nch
ON resistance R
LOW
V
OUT
= 0.1 V, V
IN
= 5.5 V
35
Ω
3
S-1135 Series A / C / E / G type (With pull-up / pull-down resistor)
Item Symbol Conditions Min. Typ. Max. Unit
Test
Circuit
Power-off pull-up /
pull-down resistor R
PD
1.0 2.2 5.0 M
Ω
4
*1. VOUT(S): Specified output voltage
VOUT(E): Actual output voltage
Output voltage when fixing IOUT(= 100 mA) and inputting VOUT(S) +1.0 V
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current.
*3. Vdrop = VIN1 (VOUT3 × 0.98)
V
OUT3 is the output voltage when VIN = VOUT(S) + 1.0 V and IOUT = 300 mA.
VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input
voltage.
*4. The change in temperature [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa []
mV/°C *1 = VOUT(S)[]
V*2 × ΔVOUT
ΔTaVOUT []
ppm/°C *3 ÷ 1000
*1. Change in temperature of the output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
*5. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the
power dissipation of the package when the output current is large.
This specification is guaranteed by design.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
16
Test Circuits
1. +
VOUT
VIN
VSS
+
V
A
ON / OFF
Set to power
ON
Figure 13
2.
VOUT
VIN
VSS
Set to V
IN
or GND
+
A
ON / OFF
Figure 14
3.
Set to V
IN
or GND
VOUT
VIN
VSS
+
V
+
A
ON / OFF
Figure 15
4.
VOUT
VIN
VSS
+
V
+
A RL
ON / OFF
Figure 16
5.
VOUT
VIN
VSS
+
V RL
Set to power
ON
ON / OFF
Figure 17
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 17
Standard Circuit
C
IN*1
C
L*2
Input
Output
GND
Single GND
VOUT
VIN
VSS
ON / OFF
*1. C
IN is a capacitor for stabilizing the input.
*2. Ceramic capacitor of 1.0 μF or more can be used as CL.
Figure 18
Caution The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Condition of Application
Input capacitor (CIN) : 1.0 μF or more
Output capacitor (CL) : 1.0 μF or more (ceramic capacitor)
Caution A general series regulator may oscillate, depending on the external components. Confirm that no
oscillation occurs in the application for which the above capacitors are used.
Selection of Input and Output Capacitors (CIN, CL)
The S-1135 Series requires an output capacitor between the VOUT and VSS pin for phase compensation. Operation is
stabilized by a ceramic capacitor with an output capacitance of 1.0 μF or more over the entire temperature range.
When using an OS capacitor, tantalum capacitor, or aluminum electrolytic capacitor, the capacitance must be 1.0 μF or
more.
The value of the output overshoot or undershoot transient response varies depending on the value of the output
capacitor. The required capacitance of the input capacitor differs depending on the application.
The recommended capacitance for an application is CIN 1.0 μF, CL 1.0 μF; however, when selecting the output
capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual device.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
18
Explanation of Terms
1. Low dropout voltage regulator
This IC’s voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor.
2. Output voltage (VOUT)
The accuracy of the output voltage is ensured at ±1.0% or ±15 mV*1 under the specified conditions of fixed input
voltage*2, fixed output current, and fixed temperature.
*1. When VOUT < 1.5 V : ±15 mV, When 1.5 V VOUT : ±1.0%
*2. Differs depending on the product.
Caution If the above conditions change, the output voltage value may vary and exceed the accuracy
range of the output voltage. Refer to “ Electrical Characteristics” and “ Characteristics
(Typical Data)” for details.
3. Line regulation
ΔVOUT1
ΔVINVOUT
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output
voltage changes due to a change in the input voltage with the output current remaining unchanged.
4. Load regulation (ΔVOUT2)
Indicates the dependency of the output voltage on the output current. That is, the values show how much the output
voltage changes due to a change in the output current with the input voltage remaining unchanged.
5. Dropout voltage (Vdrop)
Indicates the difference between input voltage VIN and the output voltage when; decreasing input voltage VIN
gradually until the output voltage has dropped out to the value of 98% of output voltage VOUT3, which is at VIN =
VOUT(S) + 1.0 V.
Vdrop = VIN1 (VOUT3 × 0.98)
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 19
6. Temperature coefficient of output voltage
ΔVOUT
ΔTaVOUT
The shaded area in Figure 19 is the range where VOUT varies in the operating temperature range when the
temperature coefficient of the output voltage is ±130 ppm/°C.
V
OUT(E)*1
Example of S-1135B30 typ. products
40 25
+0.39 mV/°C
V
OUT
[V]
*1. V
OUT(E)
is the value of the output voltage measured at 25°C.
85 Ta [°C]
0.39 mV/°C
Figure 19
A change in the temperature of the output voltage [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa []
mV/°C *1 = VOUT(S)[]
V*2 × ΔVOUT
ΔTaVOUT []
ppm/°C *3 ÷ 1000
*1. Change in temperature of output voltage
*2. Specified output voltage
*3. Output voltage temperature coefficient
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
20
Operation
1. Basic operation
Figure 20 shows the block diagram of S-1135 Series.
The error amplifier compares the reference voltage (Vref) with Vfb, which is the output voltage resistance-divided by
feedback resistors Rs and Rf. It supplies the gate voltage necessary to maintain the constant output voltage which is
not influenced by the input voltage and temperature change, to the output transistor.
*1
*1. Parasitic diode
VSS
Current
supply
+
Vfb
Vref
VIN
VOUT
Rf
Rs
Error
amplifier
Reference voltage
circuit
Figure 20
2. Output transistor
In the S-1135 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due to inverse
current flowing from the VOUT pin through a parasitic diode to the VIN pin.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 21
3. ON / OFF pin
This pin starts and stops the regulator.
When the ON / OFF pin is set to the power-off level, the entire internal circuit stops operating, and the built-in P-
channel MOS FET output transistor between the VIN and VOUT pins is turned off, reducing current consumption
significantly.
Since the S-1135 Series A / B / E / F types have a built-in discharge shunt circuit to discharge the output
capacitance, the VOUT pin is forcibly set to VSS level. In the S-1135 Series C / D / G / H types, the VOUT pin is set
to VSS level through several hundred kΩ internal divided resistors between the VOUT and VSS pins. Note that the
current consumption increases when a voltage of 0.3 V to 1.0 V (Ta = 25°C) is applied to the ON / OFF pin.
The ON / OFF pin is configured as shown in Figures 21 and 22. In the S-1135 Series A / C / E / G types, the ON /
OFF pin is internally pulled up or pulled down to VSS when in the floating status, so the VOUT pin is set to the VSS
level. In the S-1135 Series B / D / F / H types, the ON / OFF pin is not internally pulled up or pulled down, so do
not use these types with the ON / OFF pin in the floating status. When the ON / OFF pin is not used in the S-1135
Series B / D / F / H types, connect the pin to the VIN pin in the B / D types, and connect it to the VSS pin in the F / H
types.
Table 11
Logic Type ON / OFF Pin Internal Circuits VOUT Pin Voltage Current Consumption
A / B / C / D “H”: Power-on Operating Set value ISS1*1
A / B / C / D “L”: Power-off Stopped VSS level ISS2
E / F / G / H “H”: Power-off Stopped VSS level ISS2
E / F / G / H “L”: Power-on Operating Set value ISS1*1
*1. Note that the IC’s current consumption increases as much as current flows into the pull-up / pull-down
resistor when; the ON / OFF pin is connected to VIN in the A / C type, the ON / OFF pin is connected to
VSS in the E / G type (Figure 21).
(1) S-1135 Series A / C / E / G Type (2) S-1135 Series B / D / F / H Type
VSS
VIN
ON / OFF
E / G type
A / C type
VSS
VIN
ON / OFF
Figure 21 Figure 22
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
22
4. Discharge shunt function (S-1135 Series A / B / E / F types)
The S-1135 Series A / B / E / F types have a built-in discharge shunt circuit to discharge the output capacitance.
When the ON / OFF pin is set to power-off level, turns the output transistor off, and turns the discharge shunt
function on so that the output capacitor discharges. These types allow for the VOUT pin reach the VSS level faster
than the S-1135 Series C / D / G / H types that does not have a discharge shunt circuit.
Output transistor : OFF
ON / OFF Pin
: Power-off
VIN
ON / OFF
VSS
Power-off circuit
Discharge shunt function
: ON
VOUT
*1
*1. Parasitic diode
Current flow
GND
*1
S-1135 Series
Output
capacitance
(C
L
)
Figure 23
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
Rev.2.0_00 S-1135 Series
Seiko Instruments Inc. 23
5. Overcurrent protection circuit
The S-1135 Series has an overcurrent protection circuit having the characteristics shown in “(1) Output Voltage vs.
Output Current (When Load Current Increases) (Ta = 25°C)” in “ Characteristics (Typical Data)”, in order to
protect the output transistor against an excessive output current and short circuiting between the VOUT and VSS
pins. The current (Ishort) when the output pin is short-circuited is internally set at approx. 100 mA (typ.), and the
normal value is restored for the output voltage, if releasing a short circuit once.
Caution Using the overcurrent protection circuit is to protect the output transistor from accidental
conditions such as short circuited load and the rapid and large current flow in the large capacitor.
The overcurrent protection circuit is not suitable for use under the short circuit status or large
current flow ing (300 mA or more) that last long.
6. Pull-down / pull-up resistor (S-1135 Series A / C / E / G types)
In the S-1135 Series A / C / E / G types, the ON / OFF pin is internally pulled up to VIN or pulled down to VSS, so
the VOUT pin is in the VSS level when in the floating status.
Note that the IC’s current consumption increases as much as current flows into the pull-up / pull-down resistor of 2.2
MΩ (typ.) when; the ON / OFF pin is connected to VIN in the A / C type, the ON / OFF pin is connected to VSS in
the E / G type.
HIGH RIPPLE-REJECTION LOW DROPOUT MIDDLE OUTPUT CURRENT CMOS VOLTAGE REGULATOR
S-1135 Series Rev.2.0_00
Seiko Instruments Inc.
24
Precautions
Wiring patterns for the VIN, VOUT and GND pins should be designed so that the impedance is low. When mounting
an output capacitor between the VOUT and VSS pin (CL) and a capacitor for stabilizing the input between VIN and
VSS pin (CIN), the distance from the capacitors to these pins should be as short as possible.
Note that the output voltage may increase when a series regulator is used at low load current (1.0 mA or less).
Note that the output voltage may increase due to the leakage current from a driver when a series regulator is used at
high temperature.
Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for this IC. However, be sure to perform sufficient evaluation under the actual usage
conditions for selection, including evaluation of temperature characteristics. See “(5) Example of Equivalent Series
Resistance vs. Output Current Characteristics (Ta = 25°C)” in “ Reference Data” for the equivalent series
resistance (RESR) of the output capacitor.
Input capacitor (CIN) : 1.0 μF or more
Output capacitor (CL) : 1.0 μF or more
The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitor is small
or an input capacitor is not connected.