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參數(shù)資料
| 型號： | IR3637STRPBF |
| 廠商： | International Rectifier |
| 英文描述： | 1% ACCURATE SYNCHRONOUS PWM CONTROLLER |
| 中文描述： | 1％準確的同步PWM控制器 |
| 文件頁數(shù)： | 3/21頁 |
| 文件大?。?/td> | 655K |
| 代理商： | IR3637STRPBF |
IR3637SPBF
3
Rev. 1.1
06/16/05
www.irf.com
PARAMETER
Error Amp
Fb Voltage Input Bias Current
Fb Voltage Input Bias Current
Transconductance
Oscillator
Frequency
SYM TEST CONDITION
MIN TYP
MAX
UNITS
PIN DESCRIPTIONS
PIN# PIN SYMBOL PIN DESCRIPTION
1
Fb
This pin is connected directly to the output of the switching regulator via resistor divider to
set the output voltage and provide feedback to the error amplifier.
This pin provides biasing for the internal blocks of the IC as well as powers the low side
driver. A minimum of 0.1
μ
F, high frequency capacitor must be connected from this pin to
ground to provide peak drive current capability.
Output driver for the synchronous power MOSFET.
IC's ground pin. This pin must be connected directly to the ground plane. A high frequency
capacitor (0.1 to 1
μ
F) must be connected from Vcc and Vc pins to this pin for noise free
operation.
Output driver for the high side power MOSFET. The negative voltage at this pin may cause
instability for the gate drive circuit. To prevent this, a low forward voltage drop diode (e.g.
BAT54 or 1N4148) is required between this pin and ground.
This pin is connected to a voltage that must be at least 4V higher than the bus voltage
(assuming 5V threshold MOSFET) and powers the high side output driver. A minimum of
0.1
μ
F, high frequency capacitor must be connected from this pin to ground to provide
peak drive current capability.
Compensation pin of the error amplifier. An external resistor and capacitor network is
typically connected from this pin to ground to provide loop compensation.
This pin provides user programmable soft-start function. Connect an extrnal capacitor
from this pin to ground to set the start up time of the output. The converter can be shut-
down by pulling this pin below 0.4V. During shutdown the upper FET is turned off and the
lower FET is turned on.
Ramp-Amplitude Voltage
Output Drivers
Rise Time, Hdrv, Ldrv
Fall Time,Hdrv, Ldrv
Dead Band Time
Max Duty Cycle
Min Duty Cycle
SS=3V, Fb=0.6V
SS=0V, Fb=0.6V
C
L
=1500pF, Vcc=12V,2V to 9V
C
L
=1500pF, Vcc=12V, 9V to 2V
Vcc=12V, 2V to 2V
Fb=0.6V, Freq=400kHz
Fb=1V
450
360
40
81
-0.1
-64
600
400
1.25
30
30
150
85
800
440
60
60
200
0
μ
A
μ
A
μ
mho
kHz
V
ns
ns
ns
%
%
2
3
4
5
6
7
8
Vcc
LDrv
Gnd
HDrv
Vc
Comp
SS / SD
I
FB1
I
FB2
g
m
Freq
V
RAMP
T
r
T
f
T
DB
T
ON
T
OFF
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| IR3638STRPBF | 功能描述:電壓模式 PWM 控制器 HI FREQ SYNC PWM 400kHz 0.6V Track RoHS:否 制造商:Texas Instruments 輸出端數(shù)量:1 拓撲結(jié)構(gòu):Buck 輸出電壓:34 V 輸出電流: 開關(guān)頻率: 工作電源電壓:4.5 V to 5.5 V 電源電流:600 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:WSON-8 封裝:Reel |
| IR3640MPBF | 功能描述:IC REG CTRLR BUCK PWM VM 20-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝:4,000 系列:- PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1.5MHz 占空比:66.7% 電源電壓:4.75 V ~ 5.25 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:40-VFQFN 裸露焊盤 包裝:帶卷 (TR) |
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