MIC39150/39151/39152
1.5A, Low-Voltage Low-Dropout
Regulator
General Description
The MIC39150, MIC39151, and MIC39152 are 1.5A LDO
voltage regulators that provide a low voltage, high current
output with a minimum of external components. Utilizing
Micrel’s proprietary Super
βeta
PNP
®
pass element, the
MIC39150/1/2 offers extremely low dropout (typically
375mV at 1.5A) and low ground current (typically 17mA at
1.5A).
The MIC39150/1/2 are ideal for PC add-in cards that need
to convert from 3.3V to 2.5V or 2.5V to 1.8V with a
guaranteed maximum dropout voltage of 500mV over all
operating conditions. The MIC39150/1/2 exhibit fast
transient response for heavy switching applications and
requires only 10µF of output capacitance to maintain
stability and achieve fast transient response.
The MIC39150/1/2 is fully protected with current limiting,
thermal shutdown, reversed-battery protection/lead
insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag
that indicates undervoltage and overcurrent conditions.
Offered in fixed voltages of 2.5V, 1.8V and 1.65V, the
MIC39150/1 comes in the TO-220 and TO-263 (D
2
Pak)
packages. The MIC39152 adjustable option allows
programming the output voltage anywhere between 1.24V
and 15.5V and comes in 5-Pin, TO-263 (D
2
Pak) and
TO-252 (D-Pak) packages.
For applications requiring input voltage greater than 16V or
automotive load dump protection, see the MIC29150/1/2/3
family.
Features
•
1.5A minimum guaranteed output current
•
500mV maximum dropout voltage over temperature
–
Ideal for 3.0V to 2.5V conversion
–
Ideal for 2.5 to 1.8V or 1.65V conversion
•
1% initial accuracy
•
Low ground current
•
Current limiting and Thermal shutdown
•
Reversed-battery and reversed lead insertion protection
•
Reversed-leakage protection
•
Fast transient response
•
TTL/CMOS compatible enable pin (MIC39151/2 only)
•
Error flag output (MIC39151 only)
•
Adjustable output (MIC39152 only)
•
Power D-Pak package (TO-252) Adjustable only
•
Power D
2
Pak package (TO-263)
Applications
•
•
•
•
•
•
Low-voltage digital ICs
LDO linear regulator for PC add-in cards
High-efficiency linear power supplies
SMPS post regulator
Low-voltage microcontrollers
StrongARM™ processor supply
Typical Application**
MIC39150
MIC39151
MIC39152 Adjustable Output Application
(*See Minimum Load Current Section)
**See Thermal Design Section
Super ßeta PNP is a registered trademark of Micrel, Inc.
StrongARM is a trademark of Advanced RSIC Machines, Ltd.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
October 2009
M9999-102309-A
Micrel, Inc.
MIC39150/39151/39152
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) ....................................... –20V to +20V
Enable Voltage (V
EN
)....................................................+20V
Storage Temperature (T
s
) .........................–60°C to +150°C
Lead Temperature (soldering, 5 sec.)........................ 260°C
ESD Rating................................................................
Note 3
Operating Ratings
(2)
Supply Voltage (V
IN
).................................... +2.25V to +16V
Enable Voltage (V
EN
)....................................................+16V
Maximum Power Dissipation (P
D(max)
) .......................
Note 4
Junction Temperature (T
J
) ........................ –40°C to +125°C
Package Thermal Resistance
TO-263 (θ
JC
) ........................................................2°C/W
TO-220 (θ
JC
) ........................................................2°C/W
TO-252 (θ
JC
) ........................................................3°C/W
TO-252 (θ
JA
) ......................................................56°C/W
Electrical Characteristics
(5)
V
IN
= V
EN
= V
OUT
+ 1V; I
OUT
= 10mA; 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
Line Regulation
Load Regulation
10mA
10mA
≤
I
OUT
≤
1.5A, V
OUT
+ 1V
≤
V
IN
≤
8V
I
OUT
= 10mA, V
OUT
+ 1V
≤
V
IN
≤
16V
V
IN
= V
OUT
+ 1V, 10mA
≤
I
OUT
≤
1.5A
–1
–2
0.06
0.2
20
1
2
0.5
1
100
200
500
20
%
%
%
%
ppm/°C
mV
mV
mV
mA
mA
mA
A
∆V
OUT
/∆T
V
DO
Output Voltage Temp.
Coefficient,
Note 6
Dropout Voltage,
Note 7
I
OUT
= 100mA,
∆V
OUT
= –1%
I
OUT
= 750mA,
∆V
OUT
= –1%
I
OUT
= 1.5A,
∆V
OUT
= –1%
80
260
375
4
17
1.1
2.8
7
I
GND
I
GND(do)
I
OUT(lim)
I
OUT(min)
t
START
V
EN
I
IN
Ground Current,
Note 8
Dropout Ground Pin Current
Current Limit
Minimum Load Current
Start-up Time
Enable Input Voltage
Enable Input Current
I
OUT
= 750mA, V
IN
= V
OUT
+ 1V
I
OUT
= 1.5A, V
IN
= V
OUT
+ 1V
V
IN
≤
V
OUT(nominal)
– 0.5V, I
OUT
= 10mA
V
OUT
= 0V, V
IN
= V
OUT
+ 1V
V
EN
= V
IN
, I
OUT
= 10mA, C
OUT
= 47µF
logic low (off)
logic high (on)
V
EN
= 2.25V
V
EN
= 0.8V
2.25
10
150
0.8
mA
µs
V
V
µA
µA
µA
µA
µA
µA
µA
mV
mV
%
%
%
35
Enable Input (MIC39151)
1
15
30
75
2
4
I
OUT(shdn)
I
FLG(leak)
V
FLG(do)
V
FLG
Shutdown Output Voltage
Output Leakage Current
Output Low Voltage
Low Threshold
High Threshold
Hysteresis
Note 9
10
0.01
180
93
20
Flag Output (MIC39151)
V
OH
= 16V
V
IN
= 2.250V, I
OL
= 250µA,
Note 10
% of V
OUT
% of V
OUT
1
2
300
400
99.2
1
October 2009
4
M9999-102309-A
Micrel, Inc.
Symbol
Parameter
Condition
Min
MIC39150/39151/39152
Typ
Max
Units
Reference (Adjust Pin) – MIC39152 Only
V
ADJ
V
TC
I
ADJ
Reference Voltage
Reference Voltage Temperature
Coefficient
Adjust Pin Bias Current
1.228
1.215
Note 11
1.240
20
40
1.252
1.265
V
V
ppm/
°
C
80
120
nA
nA
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function outside its operating rating.
3. Devices are ESD sensitive. Handling precautions recommended.
4. P
D(max)
= (T
J(max)
– T
A
) ÷
θ
JA
, where
θ
JA
depends upon the printed circuit layout. See “Applications Information.”
5. Specification for packaged product only.
6. Output voltage temperature coefficient is
∆V
OUT(worst case)
÷ (T
J(max)
– T
J(min)
) where T
J(max)
is +125°C and T
J(min)
is –40°C.
7. V
DO
= V
IN
– V
OUT
when V
OUT
decreases to 98% of its nominal output voltage with V
IN
= V
OUT
+ 1V. For output voltages below 2.25V, dropout voltage is
the input-to-output voltage differential with the minimum input voltage being 2.25V. Minimum input operating voltage is 2.25V.
8. I
GND
is the quiescent current. I
IN
= I
GND
+ I
OUT
.
9. V
EN
≤
0.8V, V
IN
≤
8V, and V
OUT
= 0V.
10. For a 2.5V device, V
IN
= 2.250V (device is in dropout).
11. Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line
regulation effects. Specifications are for a 200mA load pulse at V
IN
= 8V for t = 10ms.
October 2009
5
M9999-102309-A
嵌入式系统
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
