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| 型号： | LT3150CGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 259K |
| 描述： | IC REG CTRLR SGL POS ADJ 16-SSOP |
| 产品培训模块： | More Information on LDOs |
| 标准包装： | 2,500 |
| 类型： | 正，可调式 |
| 输出数： | 1 |
| 输出电压： | 2.5 V ~ 18.4 V |
| 电流 - 电源： | 12mA |
| 输入电压： | 1.5 V ~ 10 V，10 V ~ 20 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
1
LT3150
3150f
Fast Transient Response,
Low Input Voltage, Very Low Dropout
Linear Regulator Controller
1.8V to 1.5V, 4A Very Low Dropout Linear Regulator
(Typical Dropout Voltage = 65mV at I
OUT
= 4A)
50mV/DIV
2A/DIV
20祍/DIV
3150 TA02
Transient Response for
0.1A to 4A Output Load Step
s
Microprocessor, ASIC and I/O Supplies
s
Very Low Dropout Input-to-Output Conversion
s
Logic Termination Supplies
s
Fast Transient Response Optimized with
Ceramic Output Capacitors
s
FET R
DS(ON)
Defines Dropout Voltage
s
?SPAN class="pst LT3150CGN-TRPBF_2648863_9">1% Reference Tolerance Over Temperature
s
Multifunction LDO Shutdown Pin with Latchoff
s
Fixed Frequency 1.4MHz Boost Converter Generates
MOSFET Gate Drive
s
Internally Compensated Boost Converter Uses Tiny
Capacitors and Inductor
s
Independent Boost Converter Shutdown Control
Permits LDO Output Voltage Supply Sequencing
s
16-Lead SSOP Package
The LT
?/DIV>
3150 drives a low cost external N-channel MOSFET
as a source follower to produce a fast transient response,
very low dropout voltage linear regulator. Selection of the
N-channel MOSFET R
DS(ON)
allows dropout voltages below
300mV for low V
IN
to low V
OUT
applications.
The LT3150 includes a fixed frequency boost regulator
that generates gate drive for the N-channel MOSFET. The
internally compensated current mode PWM architecture
combined with the 1.4MHz switching frequency permits
the use of tiny, low cost capacitors and inductors.
The LT3150s transient load performance is optimized
with ceramic output capacitors. A precision 1.21V refer-
ence accommodates low voltage supplies.
Protection includes a high side current limit amplifier that
activates a fault timer circuit. A multifunction shutdown
pin provides either current limit time-out with latchoff,
overvoltage protection or thermal shutdown. Independent
shutdown control of the boost converter provides on/off
and sequencing control of the LDO output voltage.
+
V
IN2
FB1
SHDN2
SWGND
GND
GND
SW
V
IN1
SHDN1
I
POS
I
NEG
GATE
FB2
COMP
LT3150
MBR0520L
L1
10礖
1.5k
C
IN
: PANASONIC SP SERIES EEFUE0E221R 20%
C1: AVX TAJA475M020R 20V 20%
L1: MURATA LQH32CN100K11 OR SUMIDA CDRH3D16100
243&
1%
1020&
1%
C1
4.7礔
+
C
IN
220礔
2.5V
?
V
IN
1.8V
V
OUT
1.5V
4A
6.19k
1%
1.37k
1%
Si4410
3150 TA01
2.2礔 ?0
X5R CERAMIC
0805 CASE
5.1&
6800pF
50pF
DESCRIPTIO
FEATURES
APPLICATIO S
TYPICAL APPLICATIO
, LTC and LT are registered trademarks of Linear Technology Corporation.
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