Micrel MIC5239 User Manual
General Description
MIC5239
Low Quiescent Current 500mA µCap
Features
LDO Regulator
The MIC5239 is a low quiescent current, µCap low-dropout
regulator. With a maximum operating input voltage of 30V
and a quiescent current of 23µA, it is ideal for supplying
keep-alive power in systems with high voltage batteries.
Capable of 500mA output, the MIC5239 has a dropout
voltage of only 350mV. It can provide high output current
for applications such as USB.
As a µCap LDO, the MIC5239 is stable with either a
ceramic or a tantalum output capacitor. It only requires a
3.3µF output capacitor for stability.
The MIC5239 includes a logic compatible enable input and
an undervoltage error flag indicator. Other features of the
MIC5239 include thermal shutdown, current limit, overvoltage shutdown, reverse-leakage protection, and reversebattery protection.
Available in the thermally enhanced SOIC-8, MSOP-8 and
• Ultra-low quiescent current (I
• Continuous 500mA output current
• Wide input range: 2.3V to 30V
• Low dropout voltage: 350mV @500mA
• ±1.0% initial output accuracy
• Stable with ceramic or tantalum output capacitor
• Logic compatible enable input
• Low output voltage error flag indicator
• Overcurrent protection
• Thermal shutdown
• Reverse-leakage protection
• Reverse-battery protection
• High-power SOIC-8, MSOP-8 and SOT-223 packages
Applications
= 23µA @I
Q
= 100µA)
O
SOT-223, the MIC5239 comes in fixed 1.5V, 1.8V, 2.5V,
3.0V, 3.3V and 5.0V, and adjustable voltages. For other
output voltages, contact Micrel.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
• USB power supply
• Keep-alive supply in notebook and portable personal
computers
• Logic supply from high voltage batteries
• Automotive electronics
• Battery-powered systems
___________________________________________________________________________________________________________
Typical Application
V
IN
30V
Regulator with Low IO and Low IQ
MIC5239
IN
EN
GND
OUT
FLG
V
OUT
3.0V/100µA
I
= 23µA
GND
40
35
30
25
20
15
10
I
4
= 1mA
OUT
I
= 10µA
OUT
914
I
19
OUT
= 100µA
24
29
MLF and MicroLeadFrame is a registered trademark of Amkor Technologies
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
December 2007
Ground Current vs. Input Voltage
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-121007
Micrel MIC5239
Ordering Information
Part Number
Standard Pb-Free
MIC5239-1.5BM
MIC5239-1.5BMM MIC5239-1.5YMM 1.5V –40°C to +125°C 8-pin MSOP
MIC5239-1.5BS MIC5239-1.5YS 1.5V –40°C to +125°C SOT-223
MIC5239-1.8BM MIC5239-1.8YM 1.8V –40°C to +125°C 8-pin SOIC
MIC5239-1.8BMM MIC5239-1.8YMM 1.8V –40°C to +125°C 8-pin MSOP
MIC5239-1.8BS MIC5239-1.8YS 1.8V –40°C to +125°C SOT-223
MIC5239-2.5BM MIC5239-2.5YM 2.5V –40°C to +125°C 8-pin SOIC
MIC5239-2.5BMM MIC5239-2.5YMM 2.5V –40°C to +125°C 8-pin MSOP
MIC5239-2.5BS MIC5239-2.5YS 2.5V –40°C to +125°C SOT-223
MIC5239-3.0BM MIC5239-3.0YM 3.0V –40°C to +125°C 8-pin SOIC
MIC5239-3.0BMM MIC5239-3.0YMM 3.0V –40°C to +125°C 8-pin MSOP
MIC5239-3.0BS MIC5239-3.0YS 3.0V –40°C to +125°C SOT-223
MIC5239-3.3BM MIC5239-3.3YM 3.3V –40°C to +125°C 8-pin SOIC
MIC5239-3.3BMM MIC5239-3.3YMM 3.3V –40°C to +125°C 8-pin MSOP
MIC5239-3.3BS MIC5239-3.3YS 3.3V –40°C to +125°C SOT-223
MIC5239-5.0BM MIC5239-5.0YM 5.0V –40°C to +125°C 8-pin SOIC
MIC5239-5.0BMM MIC5239-5.0YMM 5.0V –40°C to +125°C 8-pin MSOP
MIC5239-5.0BS MIC5239-5.0YS 5.0V –40°C to +125°C SOT-223
MIC5239BM MIC5239YM ADJ –40°C to +125°C 8-pin SOIC
MIC5239BMM MIC5239YMM ADJ –40°C to +125°C 8-pin MSOP
Note:
1. Other Voltages available. Contact Micrel for details.
MIC5239-1.5YM
Voltage
1.5V
(1)
Junction Temp. Range Package
–40°C to +125°C 8-pin SOIC
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Micrel MIC5239
Pin Configuration
SOIC-8 (M) SOT-223 (S) SOIC-8 (M)
MSOP-8(MM) MSOP-8(MM)
(Fixed) (Adj)
Pin Description
Pin Number
MSOP/SOIC
2 (fixed) — FLG
2 (adj) — ADJ Adjustable Feedback Input: Connect to voltage divider network.
3 1 IN Power Supply Input.
4 3 OUT Regulated Output.
1 — EN Enable (input): Logic low = shutdown; logic high = enabled.
5–8 2 GND
Pin Number
SOT-223
Pin Name Pin Function
Error FLAG (Output): Open-collector output is active low when the output
is out of regulation due to insufficient input voltage or excessive load. An
external pull-up resistor is required.
Ground: Pins 5, 6, 7, and 8 are internally connected in common via the
leadframe.
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Micrel MIC5239
Absolute Maximum Ratings
(1)
Operating Ratings
(2)
Supply Voltage (VIN) ...................................... –20V to +32V
Enable Input Voltage (V
Power Dissipation (P
Junction Temperature (T
Storage Temperature (T
Lead Temperature (soldering, 5 sec.)........................ 260°C
ESD Rating
(4)
)............................ –0.3V to +32V
EN
(3)
)
...........................Internally Limited
D
) ........................–40°C to +125°C
J
).........................–65°C to +150°C
S
SOT-23-3L ...............................................................2kV
MSOP-8L ..............................................................1.5kV
Supply Voltage (VIN).......................................... 2.3V to 30V
Enable Input Voltage (V
Junction Temperature (T
)................................... 0V to 30V
EN
) ........................–40°C to +125°C
J
Package Thermal Resistance
MSOP (
SOT-223 (
)....................................................... 80°C/W
JA
)................................................... 50°C/W
JA
= 100µA; T
OUT
(7)
(5)
= 25°C, bold values indicate –40°C T
J
–1
OUT
+1V to 30V 0.06 0.5 %
OUT
= 100µA to 500mA
OUT
I
= 100µA 50 mV
OUT
I
= 150mA
OUT
I
= 500mA 350 mV
OUT
VEN 2.0V, I
VEN 2.0V, I
V
2.0V, I
EN
= 0V 850
OUT
= 100µA
OUT
= 150mA 1.3 5 mA
OUT
= 500mA 8.5 15 mA
OUT
= 30V 0.1 1 µA
IN
(6)
15 30 mV
= 3.0V, CL = 3.3µF 160
OUT
+125°C; unless noted.
J
–2
260
23
1
2
350
400
40
45
1200
%
%
mV
mV
µA
µA
mA
µVrms
Electrical Characteristics
= V
V
IN
Symbol Parameter Condition Min Typ Max Units
V
OUT
V
V
+ 1V; V
OUT
Output Voltage Accuracy Variation from nominal V
OUT/VOUT
OUT/VOUT
Line Regulation VIN = V
Load Regulation I
V Dropout Voltage
I
Ground Pin Current
GND
I
GND(SHDN)
Ground Pin Shutdown VEN 0.6V, V
ISC Short Circuit Current V
en Output Noise 10Hz to 100kHz, V
2.0V; I
EN
FLAG Output
FLG
Low Threshold % of V
High Threshold % of V
VOL FLAG Output Low Voltage VIN = V
I
FLAG Output Leakage VOH = 30V 0.1 µA
LEAK
94 % V
OUT
95 %
OUT
OUT(nom)
– 0.12V
, IOL = 200µA 150 mV
OUT
Enable Input
VIL Input Low Voltage regulator off 0.6 V
VIH Input High Voltage regulator on 2.0
IIN Enable Input Current
VEN = 0.6V, regulator off –1.0
–2.0
VEN = 2.0V, regulator on
V
= 30V, regulator on
EN
0.15
0.5
0.01
1.0
2.0
1.0
2.0
2.5
5.0
V
µA
µA
µA
µA
µA
µA
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Micrel MIC5239
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
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The
x.xBMM (all versions) is 80°C/W, the MIC5239-x.xBM (all versions) is 63°C/W, and the MIC5239-x.xBS (all versions) is 50°C/W mounted on a
PC board, see “Thermal Characteristics” for further details.
4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. Regulation is measured at constant junction temperature using pulse testing with a low duty-cycle. Changes in output voltage due to heating
effects are covered by the specification for thermal regulation.
7. Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1.0V
differential.
(ambient temperature) is PD(max) = (TJ(max) – TA) ÷ JA. Exceeding the maximum
A
of the MIC5239-
JA
December 2007 5
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