MIC5295
Low Quiescent Current, 150mA LDO
Regulator
General Description
The MIC5295 is a 150mA highly accurate, low dropout
regulator with high input voltage and low ground current.
This combination of high voltage and low ground current
makes the MIC5295 ideal for USB and portable electronics
applications, using 1-cell, 2-cell or 3-cell Li-Ion battery
inputs.
A µCap LDO design, the MIC5295 is stable with either a
ceramic or tantalum output capacitor. It only requires a
2.2µF capacitor for stability.
Features of the MIC5295 includes enable input, thermal
shutdown, current limit, reverse battery protection, and
reverse leakage protection.
Available in fixed and adjustable output voltage versions,
the MIC5295 is offered in the TO-252-5 (D-Pak) package
with a junction temperature range of –40°C to +125°C.
Features
•
•
•
•
•
•
•
•
•
•
•
Wide input voltage range: 2.3V to 24V
Ultra low ground current: 18µA
Low dropout voltage: 300mV at 150mA
High initial output accuracy: ±1.0%
Stable with ceramic or tantalum capacitors
Excellent line and load regulation specifications
Reverse battery protection
Reverse leakage protection
Thermal shutdown and current limit protection
PowerTO-252-5 (D-Pak)package
Adjustable output from 1.24V-20V
Applications
•
•
•
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USB power supply
Cellular phones
Keep-alive supply in notebook and portable computers
Logic supply for high-voltage batteries
Automotive electronics
Battery powered systems
Typical Application
Ground Current
v s. Input Voltage
100
90
GROUND CURRENT (µA)
80
70
60
50
40
30
20
10
0
4
8
12
16
20
INPUT VOLT AGE (V)
24
100µA
10mA
Low Current Adjustable Regulator Application
Ground Current vs. Input Voltage
IttyBitty 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
November 2009
M9999-110209-A
Micrel, Inc.
MIC5295
Absolute Maximum Ratings
(1)
Input Supply Voltage ........................................ –20V to 38V
Enable Input Voltage....................................... –0.3V to 38V
Power Dissipation .....................................Internally Limited
Junction Temperature ...............................–40°C to +125°C
Storage Temperature ................................–65°C to +150°C
ESD Rating
(3)
................................................. ESD Sensitive
Operating Ratings
(2)
Input Supply Voltage ......................................... 2.3V to 24V
Enable Input Voltage............................................ 0V to 24V
Junction Thermal....................................... –40°C to +125°C
Package Thermal Resistance
TO-252-5 (θ
JA
) ...................................................50°C/W
Electrical Characteristics
(4)
V
IN
= V
OUT
+ 1V; I
OUT
= 100µA; C
IN
=1.0μF, C
OUT
=
2.2μA; T
J
= 25°C,
bold
values indicate –40°C<T
J
<+125°C; unless
otherwise specified.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Dropout Voltage
Condition
Variation from nominal V
OUT
V
IN
= V
OUT
+ 1V to 24V
Load = 100µA to 150mA
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Reference Voltage
-1.0
Ground Current
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Ground Current in Shutdown
Current Limit
Ripple Rejection
Output Voltage Noise
Output Leakage,
Reverse Polarity Input
Enable Input
Enable turn on time
Input Low Voltage
Input High Voltage
Enable Input Current
Regulator OFF
Regulator ON
V
EN
= 0.6V; Regulator OFF
V
EN
= 2.0V; Regulator ON
V
EN
= 24V; Regulator ON
2.0
–1.0
0.01
0.1
0.5
1.0
1.0
2.5
1.2
10
0.4
ms
V
V
µA
µA
µA
V
EN
= 0V; V
IN
= 24V
V
OUT
= 0V
f =1kHz
10Hz to 100kHz
Load = 500Ω; V
IN
= –15V; V
EN
=0.4V
18
0.35
1
2
0.1
350
50
47
–0.1
Min
–1.0
–2.0
0.04
0.25
45
220
260
300
1.24
+1.0
30
35
0.7
2
4
1
500
400
450
500
1
Typ
Max
+1.0
+2.0
Units
%
%
%
%
mV
mV
mV
mV
V
%
µA
µA
mA
mA
mA
µA
mA
dB
µV
RMS
µA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4. Specification for packaged product only.
November 2009
3
M9999-110209-A
单片机
京公网安备 11010802033920号
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