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参数资料
| 型号： | ILC6377SO-ADJ |
| 厂商： | Impala Linear Corporation |
| 英文描述： | 0.5A, 300KHZ, SO-8 PWM/PFM STEP DOWN CONVERTER WITH SHUTDOWN |
| 中文描述： | 为0.5A，300kHz的SO - 8封装的PWM / PFM降压转换器具有关断 |
| 文件页数： | 1/11页 |
| 文件大小： | 684K |
| 代理商： | ILC6377SO-ADJ |
Impala Linear Corporation
1
(408) 574-3939
www.impalalinear.com
June 1999
ILC6377 1.3
The ILC6377 is a 95% efficient, 300kHz step-down DC-DC
converter in an SO-8 package; capable of delivering 500mA
output current. The device is also capable of driving an
external FET for higher output current applications.
The ILC6377 uses a unique p-channel architecture with
built-in charge pump to maintain low on-resistance, even at
low input voltages. At high or normal currents the ILC6377
operates in PWM mode with 300kHz operating frequency.
When the load current drops and the device hits approxi-
mately 17% duty cycle, it automatically switches over to
PFM or pulse skipping mode. PFM (pulse frequency mod-
ulation) mode of operation extends efficiency at light loads.
Start-up is controlled via an external soft-start capacitor. The
device will automatically re-enter start-up mode when an
output current overload condition is sensed; thus providing
automatic short-circuit protection. Voltage lockout prevents
faulty operation below the minimum operating voltage level.
In shutdown, the ILC6377 consumes only 1.5mA current.
The ILC6377SO-XX offers fixed 3.3V or 5V ouput while
ILC6377SO-Adj allows adjustable output. Both versions of
ILC6377 are available in an SO-8 surface mount package.
!
±2.5% accurate output voltages
!
Guaranteed 500mA output current
!
95% efficiency
!
55mA no load battery input current
!
1.5mA shutdown current
!
Built in short circuit and overcurrent protection
!
Undervoltage lockout and soft-start
!
External transistor drive available for higher Iout
!
300kHz operation
!
Automatic switchover to PFM mode at low
currents for longest battery life
!
Fixed 3.3V or 5V or adjustable output
!
SO-8 package
!
Cellular Phones
!
Palmtops and PDAs
!
Portable Instrumentation
!
Buck Converter for Industrial / Networking Applications
PWM/PFM
CONTROLLER
Protection
L
X
GND
EXT1
RAMP WAVE
GENERATOR,
V
IN
V
O UT
P_BST
GATE
DRIVER
+
PWM
Comp
-
EXT2
+
Amp
-
1
5
4
6
3
2
7
8
S/D,
Softstar t,
Vref
S/D,
with
start
ILC6377
(TOP VIEW)
3
4
5
1
2
6
7
8
L
X
EXT1
FB
S/D,
C
SS
GND
P_BST
EXT2
V
IN
ILC6377SO-Adj
SO-8 Package
ILC6377
(TOP VIEW)
3
L
X
EXT1
GND
V
O UT
4
5
S/D,
C
SS
1
2
6
7
8
P_BST
EXT2
V
IN
SO-8 Package
ILC6377SO-XX
Ordering Information
3.3V, 300 kHz step-down PWM/PFM converter
5V, 300 kHz step-down PWM/PFM converter
Adjustable, 300 kHz step-down PWM/PFM converter
ILC6377SO-33
ILC6377SO-50
ILC6377SO-Adj
Pin
1
2
Symbol
V
IN
EXT2
Function
Power Supply
External gate drive pin (low when
P-Ch FET is ON)
P-Ch gate boost
Shutdown, also soft-start capacitor
pin and V
ref
output
Output voltage sense pin for
ILC6377SO-XX; 1V feedback for
ILC6377SO adj
Ground connection
External gate drive pin (low when
P-Ch FET is on)
Inductor switch pin
3
4
P-BST
S/D
Softstart, V
ref
V
OUT
/FB
5
6
7
GND
EXT1
8
L
X
ILC6377
0.5A, 300kHz, SO-8 PWM/PFM Step Down
Converter with Shutdown
Impala Linear Corporation
General Description
Features
Applications
Block Diagram
Pin Package Configurations
Pin Description
相关PDF资料 |
PDF描述 |
|---|---|
| ILC6377 | 0.5A, 300KHZ, SO-8 PWM/PFM STEP DOWN CONVERTER WITH SHUTDOWN |
| ILC6382CIR-33 | 1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
| ILC6382CIR-50 | 1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
| ILC6382CIR-ADJ | 1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
| ILC6382 | 1-CELL TO 3-CELL BOOST WITH TRUE LOAD DISCONNECT, 3.3V, 5V OR ADJUSTABLE OUTPUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ILC6377SOADJX | 功能描述:开关变换器、稳压器与控制器 SOIC-8 RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| ILC6380 | 制造商:IMPALA 制造商全称:IMPALA 功能描述:SOT-89 STEP-UP DUAL-MODE SWITCHER WITH SHUTDOWN |
| ILC6380AP-25 | 制造商:IMPALA 制造商全称:IMPALA 功能描述:SOT-89 STEP-UP DUAL-MODE SWITCHER WITH SHUTDOWN |
| ILC6380AP-33 | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ILC6380AP33X | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
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