MIC29150/29300/29500/29750
High-Current Low-Dropout Regulators
General Description
The MIC29150/29300/29500/29750 are high current, high
accuracy, low-dropout voltage regulators. Using Micrel's
proprietary Super
βeta
PNP
®
process with a PNP pass
element, these regulators feature 350mV to 425mV (full
load) typical dropout voltages and very low ground current.
Designed for high current loads, these devices also find
applications in lower current, extremely low dropout-critical
systems, where their tiny dropout voltage and ground
current values are important attributes.
The MIC29150/29300/29500/29750 are fully protected
against overcurrent faults, reversed input polarity, reversed
lead insertion, overtemperature operation, and positive
and negative transient voltage spikes. Five pin fixed
voltage versions feature logic level ON/OFF control and an
error flag which signals whenever the output falls out of
regulation. Flagged states include low input voltage
(dropout), output current limit, overtemperature shutdown,
and extremely high voltage spikes on the input.
On the MIC29xx1 and MIC29xx2, the ENABLE pin may be
tied to VIN if it is not required for ON/OFF control. The
MIC29150/29300/29500 are available in 3-pin and 5-pin
TO-220 and surface mount TO-263 (D
2
Pak) packages.
The MIC29750 7.5A regulators are available in 3-pin and
5-pin TO-247 packages. The 1.5A, adjustable output
MIC29152 is available in a 5-pin power D-Pak (TO-252)
package.
For applications with input voltage 6V or below, see
MIC37xxx LDOs.
Data sheets and support documentation can be found on
Micrel’s web site at www.micrel.com.
Features
•
High current capability
MIC29150/29151/29152/29153.................................1.5A
MIC29300/29301/29302/29303.................................... 3A
MIC29500/29501/29502/29503.................................... 5A
MIC29750/29751/29752............................................7.5A
•
Low-dropout voltage
•
Low ground current
•
Accurate 1% guaranteed tolerance
•
Extremely fast transient response
•
Reverse-battery and “Load Dump” protection
•
Zero-current shutdown mode (5-pin versions)
•
Error flag signals output out-of-regulation (5-pin
versions)
•
Also characterized for smaller loads with industry-
leading performance specifications
•
Fixed voltage and adjustable versions
Applications
•
•
•
•
•
Battery powered equipment
High-efficiency “Green” computer systems
Automotive electronics
High-efficiency linear lower supplies
High-efficiency lost-regulator for switching supply
_________________________________________________________________________________________________________________________
Typical Application**
Fixed Output Voltage
Adjustable Output Voltage
(*See Minimum Load Current Section)
**See Thermal Design Section
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
May 2010
M9999-050510-B
Micrel, Inc.
MIC29150/29300/29500/29750
5-Pin TO-263 (D
2
Pak) Fixed Voltage (U)
MIC29151/29301/29501
5-Pin TO-263 (D
2
Pak) Adjustable Voltage (U)
MIC29302/29502
5-Pin TO-263 (D
2
Pak) Adjustable with Flag (U)
MIC29153/29303/29503
5-Pin TO-252 (D-Pak) Adjustable Voltage (D)
MIC29152
Pin Description
Pin Number
TO-220
TO-247
TO-263
1
2
3
Pin Name
INPUT: Supplies the current to the output power device
GND: TAB is also connected internally to the IC’s ground on D-PAK.
OUTPUT: The regulator output voltage
Pin Description
Pin Number
Fixed
TO-220
TO-247
TO-263
1
2
3, TAB
4
—
Pin Number
Adjustable
TO-220
TO-247
TO-252
TO-263
1
2
3, TAB
4
5
Pin Number
Adj. with Flag
TO-220
TO-247
TO-263
—
2
3, TAB
4
5
Pin Name
ENABLE: CMOS compatible control input.
Logic high = enable, logic low = shutdown.
INPUT: Supplies the current to the output power device
GND: TAB is also connected internally to the IC’s ground on D-PAK.
OUTPUT: The regulator output voltage
ADJUST: Adjustable regulator feedback input that connects to the resistor
voltage divider that is placed from OUTPUT to GND in order to set the
output voltage.
FLAG: Active low error flag output signal that indicates an output fault
condition
5
—
1
May 2010
4
M9999-050510-B
Micrel, Inc.
MIC29150/29300/29500/29750
Absolute Maximum Ratings
(1)
Input Supply Voltage (V
IN
)
(1)
........................... –20V to +60V
Enable Input Voltage (V
EN
)................................ –0.3V to V
IN
Lead Temperature (soldering, 5sec.)......................... 260°C
Power Dissipation .....................................Internally Limited
Storage Temperature Range ....................–65°C to +150°C
ESD Rating................................................................
Note 3
Operating Ratings
(2)
Operating Junction Temperature .............. –40°C to +125°C
Maximum Operating Input Voltage ................................26V
Package Thermal Resistance
TO-220 (θ
JC
).........................................................2°C/W
TO-263 (θ
JC
).........................................................2°C/W
TO-247 (θ
JC
) .....................................................1.5°C/W
TO-252 (θ
JC
).........................................................3°C/W
TO-252 (θ
JA
) ......................................................56°C/W
Electrical Characteristics
(4,13)
V
IN
= V
OUT
+ 1V; I
OUT
= 10mA; T
J
= 25°C, bold values indicate –40°C≤ T
J
≤
+125°C, unless noted.
Parameter
Condition
Min
Typ
Max
Units
Output Voltage
Line Regulation
Load Regulation
∆V
O
∆T
Dropout Voltage
I
OUT
= 10mA
10mA
≤
I
OUT
≤
I
FL
, (V
OUT
+ 1V)
≤
V
IN
≤26V
(5)
I
OUT
= 10mA, (V
OUT
+ 1V)
≤
V
IN
≤26V
V
IN
= V
OUT
+ 5V, 10mA
≤
I
OUT
≤
1.5A
(5,9)
Output Voltage
(9)
Temperature Coefficient.
∆V
OUT
= -1%
(6)
MIC29150
MIC29300
MIC29500
MIC29750
I
OUT
= 100mA
I
OUT
= 750mA
I
OUT
= 1.5A
I
OUT
= 100mA
I
OUT
= 1.5A
I
OUT
= 3A
I
OUT
= 250mA
I
OUT
= 2.5A
I
OUT
= 5A
I
OUT
= 250mA
I
OUT
= 4A
I
OUT
= 7.5A
I
OUT
= 750mA, V
IN
= V
OUT
+ 1V
I
OUT
= 1.5A
I
OUT
= 1.5A, V
IN
= V
OUT
+ 1V
I
OUT
= 3A
I
OUT
= 2.5A, V
IN
= V
OUT
+ 1V
I
OUT
= 5A
I
OUT
= 4A, V
IN
= V
OUT
+ 1V
I
OUT
= 7.5A
–1
–2
0.06
0.2
20
1
2
0.5
1
100
%
%
%
%
ppm/°C
80
220
350
80
250
370
125
250
370
80
270
425
8
22
10
37
15
70
35
120
0.9
1.7
2.1
3.1
2.1
4.5
7.5
9.5
5
200
600
175
600
250
600
200
750
20
35
50
75
mV
Ground Current
MIC29150
MIC29300
MIC29500
MIC29750
Note 8
mA
mA
mA
mA
I
GRNDDO
Ground Pin
Current at Droupout
V
IN
= 0.5V less than specified V
OUT
× I
OUT
= 10mA
MIC29150
MIC29300
MIC29500
MIC29750
MIC29150
MIC29300
MIC29500
MIC29750
V
OUT
= 0V
(7)
V
OUT
= 0V
(7)
V
OUT
= 0V
(7)
V
OUT
= 0V
(7)
mA
mA
mA
mA
3.5
5.0
10.0
15
A
A
A
A
Current Limit
May 2010
M9999-050510-B
嵌入式系统
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