RP132x Series
Low Voltage 1A LDO with Ext. V
OUT
Adjust able
No.EK-265-121001 CMOS LDO Regulator
The RP132x Series are CMOS-based LDO regulators featuring 1A output with low on-r esistance. RP132x offers almost the same basic performances as the RP131x Series.
But RP132x offers an excellent load regulation. While the output voltage is internall y set in the RP131x Series, the RP132x Series is available in tw o versions: fixed version
in which the output voltage is internally set and the adjusted version in which it is set with an external resistor. RP132x has an inrush current limit circuit that limits
approximately 500mA when the voltage regulator turns on. The E/F Version can set the inrush current limit time by connecting a capacitor with DELAY pin.
∗) RP132H/S/J Series are suitable for automotive applications too. Please refer to our "Car Electronics Products Catalog" or contact us.
FEATURES
• Supply Current (ISS) ························Typ. 65μA (VIN=6.5V)
• Standby Current (Istandby) ················· Typ. 0.15μA (VIN=6.5V, CE="L")
• Dropout Voltage (VDIF) ····················Typ. 0.52V (IOUT=1A, VSET=2.8V)
• Ripple Rejection (RR)·····················Typ. 70dB (f=1kHz, VSET ≤ 3.3V)
• Input Voltage Range (VIN)···············1.4V to 6.5V
• Output Voltage Range (VOUT)·········· 0.8V to 5.5V (Internally fixed)
0.8V to 5.5V with external resistors (001)
(Feedback voltage : 0.8V)
• Output Voltage Accuracy ················± 1%
• Temp. coeff. of Output Voltage ······· Typ. ± 60ppm/°C
• Line Regulation······························· Typ. 0.05%/V
• Load Regulation ····························· Typ. 3mV(IOUT=300mA)
Typ. 5mV(IOUT=1A)
• Fold-back Protection Circuit ··········· Current limit Typ. 250mA
• Inrush Current Limit Circuit ············
Typ.500mA (B/D: for 500μs after start-up)
(E/F: The inrush current limit Time can be adjusted with an external capacitor.
)
• Thermal Shutdown Circuit·············· Stops at 165°C.
• Auto-discharge Function ················ D/F Version
• Packages ······································· DFN (PLP)1820-6, SOT-89-5,
HSOP-6J, TO-252-5-P2
• Ceramic capacitors can be used.··· 2.2μF or more (VSET ≤ 3.6V)
(The above shows specification at Topt=25°C. Design assurance value at -40°C ≤ Top t ≤ 85°C is also available. For details, please refer to the datasheet.)
BLOCK DIAGRAMS
RP132S/Hxx1x
(Internally fixed output voltage type)
V
DD
GND
V
OUT
CE
Vref
Current Limit
Thermal Shutdown
DELAY
RP132J/Kxx1x
(Internally fixed output voltage type)
V
DD
GND
V
OUT
CE
Vref
Current Limit
Thermal Shutdown
DELAY
V
FB
RP132x001x
(Externally adjustable output voltage type)
V
DD
GND
V
OUT
CE
Vref
Current Limit
Thermal Shutdown
DELAY
V
FB
DELAY pin: only RP132Sxx1E/F
DELAY pin: only RP132Kxx1E/F
DELAY pin: only RP132K0001E/F
SELECTION GUIDES TYPICAL APPLICATIONS
Halogen Free
Package
Q'ty per Reel
Part No.
DFN(PLP)1820-6
5,000 pcs RP132K
.
xx
.
1
.
∗
-TR
SOT-89-5 1,000 pcs RP132H
.
xx
.
1
.
#
-T1-FE
HSOP-6J 1,000 pcs RP132S
.
xx
.
1
.
∗
-E2-FE
TO-252-5-P2 3,000 pcs RP132J
.
xx
.
1
.
#
-T1-FE
RP132J/Kxx1x
Internall y fixed output voltage type
C
IN
RP132J/K
V
DD
V
OUT
CE GND
C
OUT
OUT
V
FB
RP132x001x
Ext. adjustable output voltage type
C
IN
RP132x
V
DD
V
OUT
CE GND
C
OUT
OUT
V
FB
R1
R2
.
xx
.
:
Specify the output voltage within the range of 0.8V (
.
08
.
) to 5.5V (
.
55
.
)
in 0.1V steps. For the externally adjustable output voltage type (
.
00
.
).
.
#
.
:
Select from (
.
B
.
) without auto-discharge function or
(
.
D
.
) with auto-discharge function.
.
∗
:
Select from (
.
B
.
) without auto-discharge function or
(
.
D
.
) with auto-discharge function,
(
.
E
.
)
without auto-discharge function, with inrush current limit time adjustable pin,
(
.
F
..
)
with auto-discharge function, with inrush current limit time adjustable pin.
(RP132S001E/F is not available)
CIN : 2.2μF or more,
COUT : 2.2μF or more (VSET ≤ 3.6V)
4.7μF or more (VSET > 3.6V)
Please refer to the datasheet for
details of the externally adjustable
output voltage type.
RP132K001E/F
Ext. adjustable output voltage with DELAY pin
C
IN
RP132K
001E/F
V
DD
V
OUT
CE GND
C
OUT
OUT
V
FB
R1
R2
DELAY
PACKAGES (Top Vi ew) TYPICAL CHARACTERISTIC
DFN(PLP)1820-6
SOT-89-5 HSOP-6J TO-252-5-P2
6 5 4
1 2 3
∗
1 3
5 4
2
13
64
2
5
1 2345
∗
1 VOUT
2 VFB
3 GND
4 CE
5
NC or
DELAY
6 VDD
1
CE or
2 GND
3
NC or
4 VDD
5 VOUT
1 VOUT
2 GND
3
NC or
or DELAY
4 CE
5 GND
6 VDD
1 CE
2 VDD
3 GND
4 VOUT
5 VFB
RP132x331x
Dropout Voltage vs. Output Current
∗)
The tab is substrate level (GND).
APPLICATIONS
• Power source for hand-held communication equipment, cameras, and VCRs
• Power source for home appliances
• Power source for battery-powered equipment
0
0
800200 400 600 900300 500 700100 1000
Output Current I
OUT
(mA)
Dropout Voltage V
DIF
(V)
85°C
25°C
-40°C
0.6
0.8
0.4
0.2
RP132x Series CMOS LDO Regulator
Low Voltage 1A LDO with Ext. VOUT Adjust able
The currently available information as of October 2012 is provided in this New Product News. EK-265-121001
Technical Information on Ricoh LDO Regulators
Adjustable Output Voltage Type
Adjustable Output Voltage Type Settings
The externally adjustable output voltage type can adjust the output voltage by using the external division resistance.
If the VFB voltage is described as set VFB, the output voltage can be set by using the following equations (set VFB:0.8V)
For better accuracy, choosing R1 (<<RIC) reduces this error.（RIC=Typ.1.3MΩ:(guaranteed by design), Topt=25°C）
The output voltage without the error-causing factor
VOUT = Set VFB x ((R1 + R2) / R2)
Inrush Current Limit Time Adjustable Function
If you need to limit the inrush current completely in case of using the large output capacitor, Ricoh recommends the product
equipped with the Inrush Current Limit Time Adjustable Function.
The inrush current limit circuit of the RP132x Series has a DELAY pin and is able to adjust time of the inrush current limitation by
connecting capacitor with a DELAY pin. (Graph 4)
The relation between the inrush current limit time (tD) and the capacitance of the capacitor connecting with DELAY pin (CD(F)) is
calculatable by the following formula;
tD=( CD + 70 × 10-12) × 0.525 × 106
The inrush current is limited even if the capacitor is not connected with the DELAY pin. In this case, the time is calculated as CD=0
by the formula above. (tD = about 37μs)
When you do not use CD of E/F version, the delay pin should be open.
Limiting not enough because of the
limiting time is too short
Time t (µs)
Output Voltage
Inrush Current
CE Input Voltage
Limiting the inrush current
Extended the
inrush current
limiting time
Time t (µs)
Output Voltage
Inrush Current
CE Input Voltage
(Graph 4)
Good Load Regulation
RP132x is less affected by the output current load because it separates the output voltage pin and the feedback voltage pin.
So, RP132x is very good load regulation, the load regulation is Typ.5mV (IOUT=1A)
GND
VOUT
VFB
RIC R2
IIC
I1
I2
R1
setVFB
VOUT
Notes
• The VOUT pin of RP132x081x should be connected to the VFB pin.
• RP132x081x can be adjusted the output voltage up to 5.5V.
• Please use 16kΩ or less for R2 resistor.
Imaginary graph
