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MIC2920A/29201/29202/29204
Micrel, Inc.
MIC2920A/29201/29202/29204
400mA Low-Dropout Voltage Regulator
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.
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.
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
Applications
•
•
•
•
•
•
•
•
•
Pin Configuration
TAB
TAB
TAB
OUTPUT
1
SENSE
2
SHUTDOWN
3
GROUND
4
8
INPUT
7
NC
6
NC
5
ERROR
1
2
3
MIC29201-3.3BM (SOIC-8)
OUTPUT
1
SENSE
2
SHUTDOWN
3
GROUND
4
INPUT
OUTPUT
GROUND
8
INPUT
7
A D JUST
6
5V TAP
5
ERROR
MIC2920A-x.xBS
(SOT-223)
TAB
MIC29204BM (SOIC-8)
5-Lead Package Pinouts
MIC29201 MIC29202
1) Error
Adjust
2) Input
Shutdown
3) Ground
Ground
4) Output
Input
5) Shutdown
Output
1
IN
1 2 3 4 5
3
OU T
GND
2
MIC29201/29202BU
(TO-263-5)
MIC2920A-xxBT
(TO-220)
MIC29201/29202BT
(TO-220-5)
1 2 3 4 5
Tab is Ground on SOT-223, TO-220, and TO-263 packages.
1
M9999-021505
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
February 2005
MIC2920A/29201/29202/29204
Micrel, Inc.
Voltage
3.3V
3.3V
4.85V
4.85V
5.0V
5.0V
12V
12V
3.3V
3.3V
3.3V
4.85V
4.85V
5.0V
5.0V
12V
12V
Adj
Adj
5V and Adj
5V and Adj
Junction Temp. Range
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
Package
SOT-223
TO-220-3
SOT-223
TO-220-3
SOT-223
TO-220-3
SOT-223
TO-220-3
SO-8
TO-220-5
TO-263-5
TO-220-5
TO-263-5
TO-220-5
TO-263-5
TO-220-5
TO-263-5
TO-220-5
TO-263-5
SO-8
8-pin PDIP
Ordering Information
Part Number
Standard
MIC2920A-3.3BS
MIC2920A-3.3BT
MIC2920A-4.8BS
MIC2920A-4.8BT
MIC2920A-5.0BS
MIC2920A-5.0BT
MIC2920A-12BS
MIC2920A-12BT
MIC29201-3.3BM
MIC29201-3.3BT
MIC29201-3.3BU
MIC29201-4.8BT
MIC29201-4.8BU
MIC29201-5.0BT
MIC29201-5.0BU
MIC29201-12BT
MIC29201-12BU
MIC29202BT
MIC29202BU
MIC29204BM
MIC29204BN
Pb-Free
MIC2920A-3.3WS*
MIC2920A-3.3WT*
MIC2920A-4.8WS*
MIC2920A-4.8WT*
MIC2920A-5.0WS*
MIC2920A-5.0WT*
MIC2920A-12WS*
MIC2920A-12WT*
MIC29201-3.3YM
MIC29201-3.3WT*
MIC29201-3.3WU*
MIC29201-4.8WT*
MIC29201-4.8WU*
MIC29201-5.0WT*
MIC29201-5.0WU*
MIC29201-12WT*
MIC29201-12WU*
MIC29202WT*
MIC29202WU*
MIC29204YM
MIC29204YN
* Pb-Free RoHS compliant with high-melting solder exemption.
M9999-021505
2
February 2005
MIC2920A/29201/29202/29204
Micrel, Inc.
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
V
O
Parameter
Output Voltage
Accuracy
Conditions
Variation from factory trimmed V
OUT
1mA ≤ I
L
≤ 400mA, across temp. range
MIC2920A-12 and 29201-12 only
1mA ≤ I
L
≤ 400mA, across temp. range
∆V
O
∆T
∆V
O
V
O
∆V
O
V
O
V
IN
- V
O
Output Voltage
Temperature Coef.
Line Regulation
Load Regulation
Dropout Voltage
(Note 4)
(Note 2)
V
OUT
> 10V only
V
IN
= V
OUT
+ 1V to 26V
IL = 1 to 250mA (Note 3)
I
L
= 1mA
I
L
= 100mA
I
L
= 250mA
I
L
= 400mA
I
GND
Ground Pin Current
(Note 5)
I
L
= 1mA
I
L
= 100mA
I
L
= 250mA
I
L
= 400mA
I
GNDDO
I
LIMIT
∆V
O
∆P
D
e
n
Ground Pin Current
at Dropout
(Note 5)
Current Limit
Thermal Regulation
Output Noise Voltage
(10Hz to 100kHz)
IL = 100mA
V
IN
= 0.5V less than designed V
OUT
(V
OUT
= 3.3V)
I
O
= 1mA
V
OUT
= 0V
(Note 6)
(Note 7)
CL = 10µF
CL = 100µF
V
OUT
> 10V only
V
OUT
> 10V only
Min
-1
-2
-2.5
-1.5
-3
-4
20
80
0.03
0.04
100
250
350
370
500
400
140
1.3
5
13
180
Typ
Max
1
2
2.5
1.5
3
4
100
350
0.10
0.40
0.16
0.30
150
180
%
%
mV
ppm/°C
Units
%
600
750
200
300
2
2.5
9
12
15
400
µA
mA
µA
425
0.05
400
260
100
1200
0.2
mA
%/W
µV RMS
February 2005
3
M9999-021505
MIC2920A/29201/29202/29204
Parameter
MIC29202, MIC29204
Reference Voltage
Reference Voltage
Reference Voltage
Reference Voltage
Adjust Pin
Bia Current
Reference Voltage
Temperature
Coefficient
Adjust Pin Bias
Current Temperature
Coefficient
Error Comparator
Output Leakage
Current
Output Low
Voltage
Upper Threshold
Voltage
Lower Threshold
Voltage
Hysteresis
Shutdown Input
Input Logic Voltage
MIC29201, MIC29204
V
OH
= 26V
V
IN
= 4.5V
I
OL
= 250µA
(Note 9)
(Note 9)
(Note 9)
MIC29201, MIC29202, MIC29204
Low (ON)
High (OFF)
V
SHUTDOWN
= 2.4V
V
SHUTDOWN
= 26V
Regulator Output
Current in Shutdown
(Note 10)
1.3
2.0
30
450
3
0.7
50
100
600
750
10
20
40
25
0.01
150
60
75
15
95
140
1.00
2.00
250
400
(Note 7)
MIC29202
MIC29202 (Note 8)
MIC29204
MIC29204 (Note 8)
1.223
1.210
1.204
1.210
1.200
1.185
20
20
1.235
1.235
1.247
1.260
1.266
1.260
1.270
1.285
40
60
Conditions
Min
Typ
Max
Micrel, Inc.
Units
V
V
V
V
nA
ppm/°C
0.1
nA/°C
µA
mV
mV
mV
mV
V
Shutdown Pin
Input Current
µA
µA
µA
M9999-021505
4
February 2005
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