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參數(shù)資料
| 型號： | MAX1775 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 32-Bit Digital Signal Controller with ROM 100-LQFP -40 to 125 |
| 中文描述： | 雙輸出、降壓型DC-DC轉(zhuǎn)換器，用于PDA/掌上電腦 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 290K |
| 代理商： | MAX1775 |
M
Dual-Output Step-Down
DC-DC Converter for PDA/Palmtop Computers
_______________________________________________________________________________________
9
Pin Description
PIN
NAME
FUNCTION
1
SHDNM
Shutdown for Main Regulator. A low voltage on
SHDNM
shuts off the main output. For normal
operation, connect
SHDNM
to IN.
2
SHDNC
Shutdown for Core Regulator. A low voltage on
SHDNC
shuts off the core output. For normal operation,
connect
SHDNC
to CVL.
3
PGND
Power Ground. Ground for NDRV and core output synchronous rectifier. Connect all grounds together
close to the IC.
4
NDRV
N-Channel Drive Output. Drives the main output synchronous rectifier MOSFET. NDRV swings between
CVL and PGND.
5
CVL
Low-Side Regulator Bypass. CVL is the output of an internal LDO regulator. This is the internal power
supply for the device control circuitry as well as the N-channel driver. Bypass CVL with a 1.0μF or
greater capacitor to GND. When CS- is above the CVL switchover threshold (2.47V), CVL is powered
from the main output.
6
IN
Power Supply Input
7
PDRV
P-Channel Drive Output. Drives the main output high-side MOSFET switch. PDRV swings between IN
and CVH. The voltage at CVH is regulated at V
IN
- 4.3V unless the input voltage is less than 5.5V.
High-Side Drive Bypass. CVH is the output of an internal LDO regulator with respect to V
IN
. This is the
low-side of the P-channel driver output. Bypass with a 1.0μF capacitor or greater to IN. When the input
voltage is less than +5.5V, CVH is switched to PGND.
8
CVH
9
REF
Reference Voltage Output. Bypass REF to GND with a 0.22μF or greater capacitor.
10
FBM
Main Output Feedback. Connect FBM to a resistive voltage-divider to set main output voltage between
+1.25V to +5.5V.
Main Regulator High-Side Current-Sense Input. Connect the sense resistor between CS+ and CS-.
This voltage is used to set the current limit and to turn off the synchronous rectifier when the inductor
current approaches zero.
11
CS+
12
CS-
Main Regulator Low-Side Current-Sense Input. Connect CS- to the main output.
13
FBC
Core Output Feedback. Connect FBC to a resistive voltage-divider to set core output between +1.0V to
+5.0V.
14
GND
Analog Ground
15
INC
Core Supply Input
16
LXC
Core Converter Switching Node
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1775EEE | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual-Out Step-Down for PDA/Palmtop RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1775EEE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual-Out Step-Down for PDA/Palmtop RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1775EEE+T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual-Out Step-Down for PDA/Palmtop RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1775EEE-T | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Dual-Out Step-Down for PDA/Palmtop RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1775EEE-TG069 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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