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參數(shù)資料
| 型號(hào)： | FAN1577AMX |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | DUAL SWITCHING CONTROLLER, 372 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | MS-013AC, SOP-20 |
| 文件頁數(shù)： | 1/15頁 |
| 文件大?。?/td> | 1636K |
| 代理商： | FAN1577AMX |
October 2010
2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN1577A Rev. 1.0.0
FAN1577A
—
Dual
Synchronous
DC/DC
Controller
FAN1577A
Dual Synchronous DC/DC Controller
Features
Integrates Two Sets of MOSFET Drivers
Two Independent PWM Controllers
Constant Frequency Operation: Free-running Fixed-
Frequency Oscillator Programmable: 61kHz to 340kHz
Maximum Input Supply Voltage: 15V
Programmable Output as Low as 0.7V
Internal Error Amplifier Reference Voltage:
0.7V ±1.0%
Two Soft-Start / EN Function Pins
Programmable Over-Current Protection (OCP)
30V HIGH Voltage Pin for Bootstrap Voltage
Output Over-Voltage Protection (OVP)
20-Pin SOP
Applications
CPU and GPU Vcore Power Supply
Power Supply Requiring Two Independent Outputs
Description
The FAN1577A is a high-efficiency, voltage-mode, dual-
channel, synchronous DC/DC PWM controller for two
independent outputs. The two channels are operated
out of phase. The internal reference voltage is trimmed
to 0.7V±1.0%. It is connected to the error amplifier’s
positive terminal for voltage feedback regulation.
A soft-start circuit ensures the output voltage can be
gradually and smoothly increased from zero to its final
regulated value. The soft-start pin can also be used for
chip-enable function. When two soft-start pins are
grounded, the chip is disabled, and the total operation
current can be reduced to under 0.7mA.
The fixed-frequency is programmable from 61kHz to
340kHz. The Over-Current Protection (OCP) level can
be programmed by an external current-sense resistor. It
has two integrated sets of internal MOSFET drivers.
FAN1577A is available in a 20-pin small-outline
package (SOP).
Ordering Information
Part Number
Operating Temperature Range
Package
Packing Method
FAN1577AMX
-40°C to +85°C
20-Lead, Small-Outline Package
Tape & Reel
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| FAN1581DX | 功能描述:低壓差穩(wěn)壓器 - LDO RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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