參數(shù)資料
型號(hào)： MAX1637
廠商： Maxim Integrated Products, Inc.
英文描述： Miniature, Low-Voltage, Precision Step-Down Controller
中文描述： 微型、低電壓、高精度降壓型控制器
文件頁(yè)數(shù)： 6/20頁(yè)
文件大?。?/td> 211K
代理商： MAX1637
M
Miniature, Low-Voltage,
Prec ision S tep-Down Controller
6
_______________________________________________________________________________________
____________________________________Typic al Operating Charac teristic s (c ontinued)
(V
OUT
= 3.3V, T
A
= +25°C, unless otherwise noted.)
500
μ
s/div
TIME EXITING SHUTDOWN
(V
OUT
= 3.3V, I
LOAD
= 7A)
MAX1637-16
V
1V/div
V
SHDN
5V/div
V
100mV/div
V
DL
INDUCTOR
CURRENT
-5A
0A
0V
5V
-10A
OVERVOLTAGE-PROTECTION WAVEFORMS
(V
IN
SHORTED TOV
OUT
THROUGH A 0.5
RESISTOR)
MAX1637-17
10
μ
s/div
______________________________________________________________Pin Desc ription
PIN
High-Side Current-Sense Input
Low-Side Current-Sense Input
Feedback Input. Connect to center of resistor divider.
CSH
CSL
FB
1
2
3
FUNCTION
NAME
Compensation Pin. Connect a small capacitor to GND to set the integration time constant.
1.100V Reference Output. Capable of sourcing 50μA for external loads. Bypass with 0.22μF minimum.
CC
REF
4
5
Shutdown Control Input. Turns off entire IC. When low, reduces supply current below 0.5μA (typ). Drive with
logic input or connect to RC network between GND and V
CC
for automatic start-up.
SHDN
6
Analog Ground
GND
8
Oscillator Frequency Select and Synchronization Input. Tie to V
CC
for 300kHz operation; tie to GND for
200kHz operation.
SYNC
7
Gate-Drive and Boost-Circuit Power Supply. Can be driven from a supply other than V
CC
. If the same supply
is used by both V
CC
and V
GG
, isolate V
CC
from V
GG
with a 20
resistor. Bypass to PGND with a 4.7μF
capacitor. V
GG
current = (Q
G1
+ Q
G2
) x f, where Q
G
is the MOSFET gate charge at V
GS
= V
GG
.
V
GG
10
Power Ground
Boost Capacitor Connection
PGND
BST
12
13
Low-Side Gate-Driver Output
DL
11
High-Side Gate-Driver Output
Inductor Connection
DH
LX
14
15
Low-Noise Mode Control. Forces fixed-frequency PWM operation when high.
SKIP
16
Main Analog Supply-Voltage Input to the Chip. V
CC
powers the PWM controller, logic, and reference. Input
range is 3.15V to 5.5V. Bypass to GND with a 0.1μF capacitor close to the pin.
V
CC
9
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MAX1637EEE 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1637EEE+ 功能描述:DC/DC 開關(guān)控制器 Mini Precision Step Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1637EEE+T 功能描述:DC/DC 開關(guān)控制器 Mini Precision Step Down RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1637EEE-T 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
MAX1637EVKIT 制造商:Maxim Integrated Products 功能描述:MINIATURE, LOW-VOLTAGE, PRECISION STEP-DOWN C - Bulk
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