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MIC2920A-12WT

P1-P3P4-P6P7-P9P10-P12
MIC2920A/29201/29202/29204 Micrel, Inc.
February 2005 1 M9999-021505
MIC2920A/29201/29202/29204
400mA Low-Dropout Voltage Regulator
Features
• High output voltage accuracy
• Guaranteed 400mA output
• Low quiescent current
• Low dropout voltage
• Extremely tight load and line regulation
• Very low temperature coefficient
• Current and thermal limiting
• Input withstands –20V reverse battery and
60V positive transients
• Error flag warns of output dropout
• Logic-controlled electronic shutdown
• Output programmable from 1.24V to 26V
(MIC29202/MIC29204)
• Available in TO-220-3, TO-220-5, and surface-mount
TO-263-5, SOT-223, and SO-8 packages.
Applications
• Battery-powered equipment
• Cellular telephones
• Laptop, notebook, and palmtop computers
• PCMCIA V
CC
and V
PP
regulation/switching
• Bar code scanners
• Automotive electronics
• SMPS post-regulators
• Voltage reference
• High-efficiency linear power supplies
General Description
The MIC2920A family are “bulletproof,” efficient voltage regu-
lators with very low dropout voltage (typically 40mV at light
loads and 370mV at 250mA), and very low quiescent current
(140µA typical). The quiescent current of the MIC2920A in-
creases only slightly in dropout, prolonging battery life. Key
MIC2920A features include protection against reversed bat-
tery, fold-back current limiting, and automotive “load dump”
protection (60V positive transient).
The MIC2920 is available in several configurations. The
MIC2920A-x.x devices are three pin fixed voltage regulators
available in 3.3V, 4.85V, 5V, and 12V outputs. The MIC29201
is a fixed regulator offering a logic compatible ON/OFF (shut-
down) input and an error flag output. This flag may also be
used as a power-on reset signal. A logic-compatible shutdown
input is provided on the adjustable MIC29202 which allows
the regulator to be switched on and off. The MIC29204 8-pin
SOIC adjustable regulator includes both shutdown and error
flag pins and may be pin-strapped for 5V output or programmed
from 1.24V to 26V using two external resistors.
MIC2920A-xxBT
(TO-220)
MIC29201/29202BT
(TO-220-5)
MIC29201/29202BU
(TO-263-5)
5-Lead Package Pinouts
MIC29201 MIC29202
1) Error Adjust
2) Input Shutdown
3) Ground Ground
4) Output Input
5) Shutdown Output
Tab is Ground on SOT-223, TO-220, and TO-263 packages.
1 32
TAB
INPUT OUTPUT
GROUND
MIC2920A-x.xBS
(SOT-223)
Pin Configuration
1
2
3
4
8
7
6
5
IN PUT
NC
NC
E R R O R
OU TP UT
S E N S E
SH UTDOWN
GROUND
MIC29201-3.3BM (SOIC-8)
1
2
3
4
8
7
6
5
IN PUT
ADJUST
5V TAP
E R R O R
OU TP UT
S E N S E
SH UTDOWN
GROUND
MIC29204BM (SOIC-8)
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
TAB
5
4
3
2
1
TAB
3
OUT
2
GND
1
IN
TAB
5
4
3
2
1
MIC2920A/29201/29202/29204 Micrel, Inc.
M9999-021505 2 February 2005
Ordering Information
Part Number Voltage Junction Temp. Range Package
Standard Pb-Free
MIC2920A-3.3BS MIC2920A-3.3WS* 3.3V -40°C to +125°C SOT-223
MIC2920A-3.3BT MIC2920A-3.3WT* 3.3V -40°C to +125°C TO-220-3
MIC2920A-4.8BS MIC2920A-4.8WS* 4.85V -40°C to +125°C SOT-223
MIC2920A-4.8BT MIC2920A-4.8WT* 4.85V -40°C to +125°C TO-220-3
MIC2920A-5.0BS MIC2920A-5.0WS* 5.0V -40°C to +125°C SOT-223
MIC2920A-5.0BT MIC2920A-5.0WT* 5.0V -40°C to +125°C TO-220-3
MIC2920A-12BS MIC2920A-12WS* 12V -40°C to +125°C SOT-223
MIC2920A-12BT MIC2920A-12WT* 12V -40°C to +125°C TO-220-3
MIC29201-3.3BM MIC29201-3.3YM 3.3V -40°C to +125°C SO-8
MIC29201-3.3BT MIC29201-3.3WT* 3.3V -40°C to +125°C TO-220-5
MIC29201-3.3BU MIC29201-3.3WU* 3.3V -40°C to +125°C TO-263-5
MIC29201-4.8BT MIC29201-4.8WT* 4.85V -40°C to +125°C TO-220-5
MIC29201-4.8BU MIC29201-4.8WU* 4.85V -40°C to +125°C TO-263-5
MIC29201-5.0BT MIC29201-5.0WT* 5.0V -40°C to +125°C TO-220-5
MIC29201-5.0BU MIC29201-5.0WU* 5.0V -40°C to +125°C TO-263-5
MIC29201-12BT MIC29201-12WT* 12V -40°C to +125°C TO-220-5
MIC29201-12BU MIC29201-12WU* 12V -40°C to +125°C TO-263-5
MIC29202BT MIC29202WT* Adj -40°C to +125°C TO-220-5
MIC29202BU MIC29202WU* Adj -40°C to +125°C TO-263-5
MIC29204BM MIC29204YM 5V and Adj -40°C to +125°C SO-8
MIC29204BN MIC29204YN 5V and Adj -40°C to +125°C 8-pin PDIP
* Pb-Free RoHS compliant with high-melting solder exemption.
MIC2920A/29201/29202/29204 Micrel, Inc.
February 2005 3 M9999-021505
Absolute Maximum Ratings
Input Supply Voltage .................................................–20V to +60V
Adjust Input Voltage (Notes 9 and 10) ......................–1.5V to +26V
Power Dissipation ................................... Internally Limited, Note 1
Operating Junction Temperature Range ............. –40°C to +125°C
Lead Temperature (Soldering, 5 seconds) ............................260°C
Storage Temperature Range ...............................
–65°C to +150°C
If Military/Aerospace specified devices are required, contact your local
Micrel representative/distributor for availability and specifications.
Operating Ratings
Operating Input Supply Voltage ......................................2V
†
to 26V
Adjust Input Voltage (Notes 9 and 10) ......................–1.5V to +26V
Shutdown Input Voltage ..........................................
–0.3V to +30V
Error Comparator Output Voltage ............. –0.3V to +30VOperating
Junction Temperature Range ............................. –40°C to +125°C
Thermal Characteristics:
SOT−223 θ
JC
.............................................................. 15°C/W
TO-220
θ
JC
................................................................... 3°C/W
TO-263 θ
JC
................................................................... 3°C/W
8-Pin SOIC θ
JA
.............................................................Note 1
†
Across the full operating temperature, the minimum input voltage range for
full output current is 4.3V to 26V. Output will remain in-regulation at lower
output voltages and low current loads down to an input of 2V at 25°C.
Electrical Characteristics
Limits in standard typeface are for T
J
= 25°C and limits in boldface apply over the full operating temperature range. Unless otherwise
specified, V
IN
= V
OUT
+ 1V, I
L
= 1mA, C
L
= 10µF. Adjustable versions are set for an ouptu of 5V. The MIC29202 V
SHUTDOWN
≤ 0.7V. The
eight pin MIC29204 is configured with the Adjust pin tied to the 5V Tap, the Output is tied to Output Sense (V
OUT
= 5V), and V
SHUTDOWN
≤
0.7V.
Symbol Parameter Conditions Min Typ Max Units
V
O
Output Voltage
Accuracy
Variation from factory trimmed V
OUT
-1
-2
1
2
%
1mA
≤ I
L
≤ 400mA, across temp. range -2.5 2.5
MIC2920A-12 and 29201-12 only -1.5
-3
1.5
3
1mA
≤ I
L
≤ 400mA, across temp. range -4 4
∆V
O
∆T
Output Voltage
Temperature Coef.
(Note 2) 20 100 ppm/°C
V
OUT
> 10V only 80 350
∆V
O
V
O
Line Regulation V
IN
= V
OUT
+ 1V to 26V 0.03 0.10
0.40
%
∆V
O
V
O
Load Regulation IL = 1 to 250mA (Note 3) 0.04 0.16
0.30
%
V
IN
- V
O
Dropout Voltage
(Note 4)
I
L
= 1mA
I
L
= 100mA
V
OUT
> 10V only
I
L
= 250mA
V
OUT
> 10V only
I
L
= 400mA
100
250
350
370
500
400
150
180
600
750
mV
I
GND
Ground Pin Current
(Note 5)
I
L
= 1mA
I
L
= 100mA
I
L
= 250mA
I
L
= 400mA
140
1.3
5
13
200
300
2
2.5
9
12
15
µA
mA
I
GNDDO
Ground Pin Current
at Dropout
(Note 5)
V
IN
= 0.5V less than designed V
OUT
(V
OUT
= 3.3V)
I
O
= 1mA
180 400 µA
I
LIMIT
Current Limit V
OUT
= 0V
(Note 6)
425 100
1200
mA
∆V
O
∆P
D
Thermal Regulation (Note 7) 0.05 0.2 %/W
e
n
Output Noise Voltage
(10Hz to 100kHz)
IL = 100mA
CL = 10
µF
CL = 100
µF
400
260
µV RMS
P1-P3P4-P6P7-P9P10-P12

MIC2920A-12WT

Mfr. #:
Buy MIC2920A-12WT
Manufacturer:
Microchip Technology / Micrel
Description:
LDO Voltage Regulators 400mA LDO Fixed Voltage
Lifecycle:
New from this manufacturer.
Delivery:
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