MIC35152
1.5A, Low Voltage µCap LDO Regulator
General Description
The MIC35152 is a 1.5A low-dropout linear voltage
regulator that provides a low voltage, high current output
with a minimum of external components. It offers high
precision, ultra-low dropout (600mV over temperature),
and low ground current.
The MIC35152 operates from an input of 2.25V to 6.0V. It
is designed to drive digital circuits requiring low voltage at
high currents (i.e., PLDs, DSPs, micro-controllers, etc.),
providing an adjustable output voltage from 1.24V to 5.4V.
Features of the MIC35152 LDO include current limiting
and thermal protection, and reverse current and reverse
battery protection. Also logic (active-HIGH) enable pin is
included. The MIC35152 is available in a 5-pin power
D-Pak package (TO-252) with and operating temperature
range of –40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
1.5A minimum guaranteed output current
•
600mV maximum dropout voltage over temperature
–
Ideal for 3.0V to 2.5V conversion
–
Ideal for 2.5V to 1.8V, 1.65V, or 1.5V conversion
•
Stable with ceramic or tantalum capacitor
•
Wide input voltage range
– V
IN
: 2.25V to 6.0V
•
±1.0% initial output tolerance
•
Excellent line and load regulation specifications
•
Logic controlled shutdown
•
Thermal shutdown and current limit protection
•
Reverse-leakage protection
•
–40°C to +125°C junction temperature
•
Power D-Pak package (TO-252)
Applications
•
•
•
•
•
LDO linear regulator for low-voltage digital IC
PC add-in cards
High efficiency linear power supplies
SMPS post regulator
Battery charger
Typical Application**
Adjustable Regulator Application
(*See Minimum Load Curren Section)
**See Thermal Design Section
Super ßeta PNP is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
October 2009
M9999-102309-A
Micrel, Inc.
MIC35152
Ordering Information
Part Number
MIC35152WD*
Note:
*RoHS compliant with ‘high-melting solder’ exemption.
Output Current
1.5A
Voltage
Adjustable
Junction Temp. Range(1)
–40° to +125°C
Package
5-Pin TO-252
Pin Configuration
5-Pin TO-252 D-Pak (D)
Pin Description
Pin Number
1
2
3
4
Pin Name
EN
IN
GND, TAB
OUT
Pin Function
Enable (Input): CMOS compatible input.
Logic high = enable, logic low = shutdown.
Input Voltage: Supplies the current to the output power device
Ground: TAB is also connected internally to the IC’s ground on D-PAK.
Regulator Output: The output voltage is set by the resistor divider
connected from OUT to GND (with the divided connection tied to ADJ).
A minimum value capacitor must be used to maintain stability. See
Applications Information.
Adjustable Regulator Feedback Input: Connect to the resistor voltage
divider that is placed from OUT to GND in order to set the output
voltage.
5
ADJ
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MIC35152
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ..................................... –0.3V to +6.5V
Enable Input Voltage (V
EN
)........................... –0.3V to +6.5V
Power Dissipation .....................................Internally Limited
Junction Temperature .........................–40°C
≤
T
J
≤
+125°C
Storage Temperature (T
s
) ...................–65°C
≤
T
J
≤
+150°C
Lead Temperature (soldering, 5sec.)......................... 260°C
ESD Rating................................................................
Note 3
Operating Ratings
(2)
Supply voltage (V
IN
) ................................... +2.25V to +6.0V
Enable Input Voltage (V
EN
)................................ 0V to +6.0V
Junction Temperature Range .............–40°C
≤
T
J
≤
+125°C
Maximum Power Dissipation.....................................
Note 4
Package Thermal Resistance
TO-252 (θ
JC
) ........................................................3°C/W
TO-252 (θ
JA
) ......................................................56°C/W
Electrical Characteristics
(5)
T
J
= 25°C with V
IN
= V
EN
= V
OUT
+ 1V; I
OUT
= 10mA;
bold
values indicate –40°C < T
J
< +125°C, unless otherwise noted.
Parameter
Output Voltage Line Regulation
Output Voltage Load Regulation
Dropout Voltage, V
IN
– V
OUT
Note 6
Ground Pin Current,
Note 7
Ground Pin Current in Shutdown
Current Limit
Start-up Time
Enable Input
Enable Input Threshold
Enable Pin Input Current
Regulator enable
Regulator shutdown
V
IL
≤
0.8V (regulator shutdown)
V
IH
≥
2.25V (regulator enabled)
Adjust Pin
Reference Voltage
Reference Voltage Temp.
Coefficient
Adjust Pin Bias Current
Adjust Pin Bias Current Temp.
Coefficient
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended.
P
D(MAX)
= (T
J(MAX)
– T
A
) /
θ
JA
, where
θ
JA
, depends upon the printed circuit layout. See “Applications Information.”
Specification for packaged product only.
V
DO
= V
IN
– V
OUT
when V
OUT
decreased to 98% of its nominal output voltage with V
IN
= V
OUT
+1V. For output voltages below 1.75V, dropout voltage
specification does not apply due to a minimum input operating voltage of 2.25V.
I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
.
Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 200mA load pulse at V
IN
= 6V for t = 10ms.
Condition
V
IN
= V
OUT
+1.0V to 6.0V
I
OUT
= 10mA to 1.5A
I
OUT
= 750mA
I
OUT
= 1.5A
I
OUT
= 1.5A
V
IL
≤
0.5V, V
IN
= V
OUT
+ 1V
V
OUT
= 0
V
EN
= V
IN
, I
OUT
= 10mA, C
OUT
= 47µF
Min
Typ
0.06
0.2
225
365
11
1.0
2.7
45
Max
0.5
1
350
600
30
4.0
150
Units
%
%
mV
mV
mA
µA
A
µs
V
2.25
0.8
2
4
1
15
30
75
1.252
1.265
20
40
0.1
80
120
V
µA
µA
µA
µA
V
V
ppm/°C
nA
nA
nA/°C
1.228
1.215
Note 8
1.240
October 2009
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Micrel, Inc.
MIC35152
Typical Characteristics
October 2009
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M9999-102309-A
Micrel, Inc.
MIC35152
Functional Characteristics
October 2009
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M9999-102309-A
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