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MIC5237-3.3YU-TR

P1-P3P4-P6P7-P9
MIC5237
500mA Low-Dropout Regulator
Super βeta 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
September 2007
M9999-090607-C
General Description
The MIC5237 is a general-purpose low-dropout regulator
capable of 500mA output current with better than 3%
output voltage accuracy. Using Micrel’s proprietary Super
ßeta PNP
®
process with a PNP pass element, these
regulators feature less than 300mV dropout voltage and
typically 8mA ground current at full load.
Designed for applications that require moderate current
over a broad input voltage range, including hand-held and
battery-powered devices, the MIC5237 is intended for
applications that can tolerate moderate voltage drop at
higher current.
Key features include low ground current to help prolong
battery life, reversed-battery protection, current limiting,
over-temperature shutdown, and thermally efficient
packaging. The MIC5237 is available in fixed output
voltages only.
For space-critical applications and improved performance,
see the MIC5209 and MIC5219. For output current
requirements up to 750mA, see the MIC2937.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Guaranteed 500mA output over the full operating
temperature range
• Low 300mV typical dropout voltage at full load
• Extremely tight load and line regulation
• Current and thermal limiting
• Reversed-battery protection
• TO-220 and TO-263 packages
• Low temperature coefficient
• No-load stability
• Low-noise output
Applications
• Portable and laptop computers
• Desktop computer
• Battery chargers
• SMPS post-regulator/dc-to-dc modules
• Consumer and personal electronics
___________________________________________________________________________________________________________
Typical Application
Micrel, Inc. MIC5237
September 2007
2
M9999-090607-C
Ordering Information
Part Number
Standard Pb-Free
Voltage Junction Temp. Range Package
MIC5237-2.5BU MIC5237-2.5YU 2.5V –40° to +125°C TO-263-3
MIC5237-3.3BU MIC5237-3.3YU 3.3V –40° to +125°C TO-263-3
MIC5237-5.0BT MIC5237-5.0YT 5.0V –40° to +125°C TO-220-3
MIC5237-5.0BU MIC5237-5.0YU 5.0V –40° to +125°C TO-263-3
Pin Configuration
TO-220-3 (T) TO-263-3 (U)
Pin Description
Pin Number Pin Name Pin Function
1 IN Supply Input.
2, TAB GND Ground: TO-220 and TO-263 pin 2 and TAB are internally connected.
3 OUT Regulator Output.
Micrel, Inc. MIC5237
September 2007
3
M9999-090607-C
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
)..........................................–20 to +20V
Power Dissipation (P
D
)..............................Internally Limited
Lead Temperature (soldering, 5 sec.)........................ 260°C
Operating Ratings
Supply Voltage (V
IN
)...................................... +2.5V to +16V
Junction Temperature (T
J
) ........................ –40°C to +125°C
Package Thermal Resistance
TO-220 (θ
JA
).......................................................55°C/W
TO-220 (θ
JC
) ........................................................3°C/W
TO-263 (θ
JC
) ........................................................3°C/W
Electrical Characteristics
V
IN
= V
OUT
+ 1.0V; C
OUT
= 4.7µF; I
OUT
= 100µA; T
J
= 25°C, bold values indicate –40°C< T
J
< +125°C, unless noted.
Symbol Parameter Condition Min Typ Max Units
V
OUT
Output Voltage Accuracy variation from nominal V
OUT
–3
–5
3
5
%
%
∆V
OUT
/∆T
Output Voltage
Temperature Coefficient
Note 2
40
ppm/°C
∆V
OUT
/V
OUT
Line Regulation V
IN
= V
OUT
+ 1V to 16V
0.015
0.05
0.1
%/V
%/V
∆V
OUT
/V
OUT
Load Regulation
I
OUT
= 100µA to 500mA, Note 3
0.05
0.5
0.7
%
%
I
OUT
= 100µA 10
70
90
mV
mV
I
OUT
= 50mA 115
190
280
mV
mV
I
OUT
= 150mA 165
350
450
mV
mV
V
IN
– V
OUT
Dropout Voltage, Note 4
I
OUT
= 500mA 300
600
700
mV
mV
I
OUT
= 100µA 80
130
170
µA
µA
I
OUT
= 50mA 350
650
900
µA
µA
I
OUT
= 150mA 1.8
2.5
3.0
mA
mA
I
GND
Ground Pin Current, Note 5
I
OUT
= 500mA 8
15
20
mA
mA
PSRR Ripple Rejection f = 120Hz 75 dB
I
LIMIT
Current Limit V
OUT
= 0V 700
900
1000
mA
mA
∆V
OUT
/∆P
D
Thermal Regulation
Note 6
0.05 %/W
e
no
Output Noise V
OUT
= 5.0V, I
OUT
= 50Ma, C
OUT
= 2.2µF 500 nV/√Hz
P1-P3P4-P6P7-P9

MIC5237-3.3YU-TR

Mfr. #:
Buy MIC5237-3.3YU-TR
Manufacturer:
Microchip Technology / Micrel
Description:
LDO Voltage Regulators 500mA 3% LDO Improved LM2937
Lifecycle:
New from this manufacturer.
Delivery:
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