MIC5335
Dual, High Performance
300mA µCap ULDO™
ULDO is a trademark of Micrel, Inc.
MLF and MicroLead Frame are registered trademarks of Amkor Technologies.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2008
M9999-051508
General Description
The MIC5335 is a high current density, dual Ultra Low
Dropout (ULDO™) linear regulator. The MIC5335 is
ideally suited for portable electronics which demand
overall high performance in a very small form factor.
The MIC5335 is offered in the ultra small 1.6mm x
1.6mm x 0.55mm 6-ld Thin MLF
®
package, which is
only 2.56mm
2
in area. The MIC5335 delivers
exceptional thermal performance for those
applications that demand higher power dissipation in
a very small foot print. In addition, the MIC5335
integrates two high performance 300mA LDOs with
independent enable functions and offers high PSRR
eliminating the need for a bypass capacitor.
The MIC5335 is a µCap design which enables
operation with very small output capacitors for
stability, thereby reducing required board space and
component cost.
The MIC5335 is available in fixed-output voltages.
Additional voltages are available. For more
information, contact Micrel’s Marketing department.
Data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
Features
2.3V to 5.5V input voltage range
Ultra-low dropout voltage: 75mV at 300mA
Ultra Small 1.6mm x 1.6mm x 0.55mm 6 lead MLF
®
package
Independent enable pins
High PSRR > 65dB @ 1kHz
300mA output current per LDO
µCap Stable with 1µF ceramic capacitor
Low quiescent current: 90µA/LDO
Fast turn-on time: 30µs
Thermal Shutdown Protection
Current Limit Protection
Applications
Mobile Phones
PDAs
GPS Receivers
Portable electronics
Portable media players
Digital still and video cameras
Typical Application
Micrel, Inc. MIC5335
May 2008 2 M9999-051508
MIC5335 Block Diagram
Micrel, Inc. MIC5335
May 2008 3 M9999-051508
Ordering Information
Part number Manufacturing
Part Number Marking Voltage* Junction
Temp. Range Package
MIC5335-1.8/1.5YMT MIC5335-GFYMT GPF 1.8V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-1.8/1.6YMT MIC5335-GWYMT GPW 1.8V/1.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-1.8/1.8YMT MIC5335-GGYMT GPG 1.8V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.5/1.8YMT MIC5335-JGYMT JPG 2.5V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.5/2.5YMT MIC5335-JJYMT JPJ 2.5V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.6/1.85YMT MIC5335-KDYMT KPD 2.6V/1.85 –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.6/1.8YMT MIC5335-KGYMT KPG 2.6V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.7/2.7YMT MIC5335-LLYMT LPL 2.7V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.8/1.5YMT MIC5335-MFYMT MPF 2.8V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.8/1.8YMT MIC5335-MGYMT MPG 2.8V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.8/2.6YMT MIC5335-MKYMT MPK 2.8V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.8/2.8YMT MIC5335-MMYMT MPM 2.8V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.85/1.85YMT MIC5335-NDYMT NPD 2.85V/1.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.85/2.6YMT MIC5335-NKYMT NPK 2.85V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.85/2.85YMT MIC5335-NNYMT NPN 2.85V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.9/1.5YMT MIC5335-OFYMT OPF 2.9V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.9/1.8YMT MIC5335-OGYMT OPG 2.9V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-2.9/2.9YMT MIC5335-OOYMT OPO 2.9V/2.9V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.0/1.8YMT MIC5335-PGYMT PPG 3.0V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.0/2.5YMT MIC5335-PJYMT PPJ 3.0V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.0/2.6YMT MIC5335-PKYMT PPK 3.0V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.0/2.8YMT MIC5335-PMYMT PPM 3.0V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.0/2.85YMT MIC5335-PNYMT PPN 3.0V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.0/3.0YMT MIC5335-PPYMT PPP 3.0V/3.0V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/1.5YMT MIC5335-SFYMT SPF 3.3V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/1.8YMT MIC5335-SGYMT SPG 3.3V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/2.5YMT MIC5335-SJYMT SPJ 3.3V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/2.6YMT MIC5335-SKYMT SPK 3.3V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/2.7YMT MIC5335-SLYMT SPL 3.3V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/2.8YMT MIC5335-SMYMT SPM 3.3V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/2.85YMT MIC5335-SNYMT SPN 3.3V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/2.9YMT MIC5335-SOYMT SPO 3.3V/2.9V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/3.0YMT MIC5335-SPYMT SPP 3.3V/3.0V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/3.2YMT MIC5335-SRYMT SPR 3.3V/3.2V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
MIC5335-3.3/3.3YMT MIC5335-SSYMT SPS 3.3V/3.3V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF
®
Note:
* For other voltages available. Contact Micrel Marketing for details.
Micrel, Inc. MIC5335
May 2008 4 M9999-051508
Pin Configur ation
1VIN
GND
EN2
6 VOUT1
VOUT2
EN1
5
4
2
3
6-pin 1.6mm × 1.6mm Thin MLF
®
Top View
Pin Description
Pin Number
Thin MLF-6 Pin Name
Pin Function
1 VIN Supply Input.
2 GND Ground
3 EN2
Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
4 EN1
Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
5 VOUT2 Regulator Output – LDO2
6 VOUT1 Regulator Output – LDO1
HS Pad EPAD Exposed heatsink pad connected to ground internally.
Micrel, Inc. MIC5335
May 2008 5 M9999-051508
Absolute Maximum Ratings(1)
Supply Voltage (V
IN
) .....................................0V to +6V
Enable Input Voltage (V
EN
)...........................0V to +6V
Power Dissipation...........................Internally Limited
(3)
Lead Temperature (soldering, 3sec ...................260°C
Storage Temperature (T
S
)................. -65°C to +150°C
ESD Rating
(4)
.........................................................2kV
Operating Ratings(2)
Supply voltage (V
IN
)............................... +2.3V to +5.5V
Enable Input Voltage (V
EN
).............................. 0V to V
IN
Junction Temperature ......................... -40°C to +125°C
Junction Thermal Resistance
Thin MLF
®
-6 (θ
JA
) ................................... 100°C/W
Electrical Characteristics(5)
V
IN
= EN1 = EN2 = V
OUT
+ 1.0V; higher of the two regulator outputs, I
OUTLDO1
= I
OUTLDO2
= 100µA; C
OUT1
= C
OUT2
= 1µF;
T
J
= 25°C, bold values indicate –40°C T
J
+125°C, unless noted.
Parameter Conditions Min Typ Max Units
Variation from nominal V
OUT
-2.0 +2.0 % Output Voltage Accuracy
Variation from nominal V
OUT
; –40°C to +125°C -3.0 +3.0 %
Line Regulation V
IN
= V
OUT
+ 1V to 5.5V; I
OUT
= 100µA 0.02 0.3
0.6
%/V
%/V
Load Regulation I
OUT
= 100µA to 300mA 0.3 2.0 %
Dropout Voltage (Note 6) I
OUT
= 100µA
I
OUT
= 100mA
I
OUT
= 150mA
I
OUT
= 300mA
0.1
25
35
75
75
100
200
mV
mV
mV
mV
Ground Current EN1 = High; EN2 = Low; I
OUT
= 100µA to 300mA
EN1 = Low; EN2 = High; I
OUT
= 100µA to 300mA
EN1 = EN2 = High; I
OUT1
= 300mA, I
OUT2
= 300mA
90
90
150
125
125
220
µA
µA
µA
Ground Current in Shutdown EN1 = EN2 = 0V 0.01 2 µA
Ripple Rejection f = 1kHz; C
OUT
= 1.0µF
f = 20kHz; C
OUT
= 1.0µF
65
45
dB
Current Limit V
OUT
= 0V 340 550 950 mA
Output Voltage Noise C
OUT
= 1.0µF; 10Hz to 100kHz 90 µV
RMS
Enable Inputs (EN1 / EN2)
Logic Low 0.2 V Enable Input Voltage
Logic High 1.1 V
V
IL
0.2V 0.01 1 µA Enable Input Current
V
IH
1.0V 0.01 1 µA
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2) C
OUT
= 1.0µF 30 100 µs
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. The maximum allowable power dissipation of any T
A
(ambient temperature) is P
D(max)
= (T
J(max)
– T
A
) / θ
JA
. Exceeding the maximum allowable
power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal V
OUT
. For outputs below
2.3V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V.
Micrel, Inc. MIC5335
May 2008 6 M9999-051508
Typical Characteristics
Micrel, Inc. MIC5335
May 2008 7 M9999-051508
Functional Characteristics
Micrel, Inc. MIC5335
May 2008 8 M9999-051508
Applications Information
Enable/Shutdown
The MIC5335 comes with dual active-high enable pins
that allow each regulator to be enabled independently.
Forcing the enable pin low disables the regulator and
sends it into a “zero” off-mode-current state. In this
state, current consumed by the regulator goes nearly
to zero. Forcing the enable pin high enables the
output voltage. The active-high enable pin uses
CMOS technology and the enable pin cannot be left
floating; a floating enable pin may cause an
indeterminate state on the output.
Input Capacitor
The MIC5335 is a high-performance, high bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. A 1µF capacitor is
required from the input-to-ground to provide stability.
Low-ESR ceramic capacitors provide optimal
performance at a minimum of space. Additional high-
frequency capacitors, such as small-valued NPO
dielectric-type capacitors, help filter out high-
frequency noise and are good practice in any RF-
based circuit.
Output Capacitor
The MIC5335 requires an output capacitor of 1µF or
greater to maintain stability. The design is optimized
for use with low-ESR ceramic chip capacitors. High
ESR capacitors may cause high frequency oscillation.
The output capacitor can be increased, but
performance has been optimized for a 1µF ceramic
output capacitor and does not improve significantly
with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
performance. X7R-type capacitors change
capacitance by 15% over their operating temperature
range and are the most stable type of ceramic
capacitors on the market. Z5U and Y5V dielectric
capacitors change value by as much as 50% and
60%, respectively, over their operating temperature
ranges. To use a ceramic chip capacitor with Y5V
dielectric, the value must be much higher than an X7R
ceramic capacitor to ensure the same minimum
capacitance over the equivalent operating
temperature range.
No-Load Stability
Unlike many other voltage regulators, the MIC5335
will remain stable and in regulation with no load. This
is especially important in CMOS RAM keep-alive
applications.
Thermal Considerations
The MIC5335 is designed to provide 300mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature
can be calculated based upon the output current and
the voltage drop across the part. Given that the input
voltage is 3.3V, the output voltage is 2.8V for V
OUT1
,
2.5V for V
OUT2
and the output current = 300mA. The
actual power dissipation of the regulator circuit can be
determined using the equation:
P
D
= (V
IN
– V
OUT1
) I
OUT1
+ (V
IN
– V
OUT2
) I
OUT2
+ V
IN
I
GND
Because this device is CMOS and the ground current
is typically <100µA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
P
D
= (3.3V – 2.8V) × 300mA + (3.3V – 2.5V) × 300mA
P
D
= 0.39W
To determine the maximum ambient operating
temperature of the package, use the junction-to-
ambient thermal resistance of the device and the
following basic equation:
=
JA
AJ(max)
D(max) θ
TT
P
T
J(max)
= 125°C, the maximum junction temperature of
the die θ
JA
thermal resistance = 100°C/W.
The table that follows shows junction-to-ambient
thermal resistance for the MIC5335 in the Thin MLF
®
package.
Package
θ
JA
Recommended
Minimum
Footprint
θ
JC
6-Pin 1.6 X1.6
Thin MLF™
100°C/W 2°C/W
Thermal Resistance
Substituting P
D
for P
D(max)
and solving for the ambient
operating temperature will give the maximum
operating conditions for the regulator circuit. The
junction-to-ambient thermal resistance for the
minimum footprint is 100°C/W.
The maximum power dissipation must not be
exceeded for proper operation.
For example, when operating the MIC5335-MFYML at
an input voltage of 3.3V and 300mA loads on each
output with a minimum footprint layout, the maximum
ambient operating temperature T
A
can be determined
as follows:
0.39W = (125°C – T
A
)/(100°C/W)
Micrel, Inc. MIC5335
May 2008 9 M9999-051508
T
A
=86°C
Therefore, a 2.8V/2.5V application with 300mA at
each output current can accept an ambient operating
temperature of 86°C in a 1.6mm x 1.6mm Thin MLF
®
package. For a full discussion of heat sinking and
thermal effects on voltage regulators, refer to the
“Regulator Thermals” subsection of Micrel’s Designing
with Low-Dropout Voltage Regulators handbook. This
information can be found on Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
Micrel, Inc. MIC5335
May 2008 10 M9999-051508
Package Information
6-Pin 1.6mm x 1.6mm Thin MLF
®
(MT)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http:/www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for
its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a
product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for
surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant
injury to the user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk
and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2006 Micrel, Inc.
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Micrel:
MIC5335-OGYMT TR MIC5335-KGYMT TR MIC5335-SJYMT TR MIC5335-MGYMT TR MIC5335-SPYMT TR
MIC5335-SMYMT TR MIC5335-PNYMT TR MIC5335-PJYMT TR MIC5335-SNYMT TR MIC5335-NKYMT TR
MIC5335-PPYMT TR MIC5335-JGYMT TR MIC5335-GGYMT TR MIC5335-PMYMT TR MIC5335-SSYMT TR
MIC5335-SFYMT TR MIC5335-KDYMT TR MIC5335-SLYMT TR MIC5335-PGYMT TR MIC5335-SGYMT TR
MIC5335-MFYMT TR MIC5335-LLYMT TR MIC5335-GFYMT TR MIC5335-SRYMT TR MIC5335-SOYMT TR
MIC5335-NNYMT TR MIC5335-SKYMT TR MIC5335-GWYMT TR MIC5335-NDYMT TR MIC5335-PKYMT TR
MIC5335-MKYMT TR MIC5335-MMYMT TR MIC5335-JJYMT TR MIC5335-OOYMT TR MIC5335-OFYMT TR
MIC5335-JGYMT-TR MIC5335-KDYMT-TR MIC5335-JJYMT-TR MIC5335-PPYMT-TR MIC5335-OOYMT-TR
MIC5335-SKYMT-TR MIC5335-NDYMT-TR MIC5335-PJYMT-TR MIC5335-SSYMT-TR MIC5335-PKYMT-TR
MIC5335-SRYMT-TR MIC5335-NNYMT-TR MIC5335-MGYMT-TR MIC5335-MFYMT-TR MIC5335-SNYMT-TR
MIC5335-MMYMT-TR MIC5335-SMYMT-TR MIC5335-SOYMT-TR MIC5335-OFYMT-TR MIC5335-MKYMT-TR
MIC5335-PNYMT-TR MIC5335-SLYMT-TR MIC5335-LLYMT-TR MIC5335-SJYMT-TR MIC5335-PGYMT-TR
MIC5335-SGYMT-TR MIC5335-OGYMT-TR MIC5335-SPYMT-TR MIC5335-PMYMT-TR MIC5335-NKYMT-TR
MIC5335-SFYMT-TR MIC5335-GFYMT-TR MIC5335-GWYMT-TR MIC5335-KGYMT-TR MIC5335-GGYMT-TR