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参数资料
| 型号： | FAN1577AMX |
| 厂商： | Fairchild Semiconductor |
| 文件页数： | 1/15页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM VM 20-SOIC |
| 标准包装： | 1 |
| PWM 型： | 电压模式 |
| 输出数： | 2 |
| 频率 - 最大： | 372kHz |
| 占空比： | 95% |
| 电源电压： | 10 V ~ 15 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 包装： | 标准包装 |
| 其它名称： | FAN1577AMXDKR |
October 2010
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
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).
Applications
CPU and GPU Vcore Power Supply
Power Supply Requiring Two Independent Outputs
Ordering Information
Part Number
FAN1577AMX
Operating Temperature Range
-40°C to +85°C
Package
20-Lead, Small-Outline Package
Packing Method
Tape & Reel
? 2010 Fairchild Semiconductor Corporation
FAN1577A ? Rev. 1.0.0
www.fairchildsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FAN1581 | 制造商:FAIRCHILD 制造商全称:Fairchild Semiconductor 功能描述:5A Adjustable/Fixed Ultra Low Dropout Linear Regulator |
| FAN1581D15X | 功能描述:低压差稳压器 - LDO 5A Adjustable Low Dropout Voltage Regulator (LDO) RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| FAN1581D25X | 功能描述:低压差稳压器 - LDO 5A Adjustable Low Dropout Voltage Regulator (LDO) RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| FAN1581DX | 功能描述:低压差稳压器 - LDO RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| FAN1581M | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Positive Adjustable Voltage Regulator |
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