FAN5035MTCX PDF资料下载(3/10 页)SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO24

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参数资料

型号：	FAN5035MTCX
厂商：	FAIRCHILD SEMICONDUCTOR CORP
元件分类：	稳压器
英文描述：	SWITCHING CONTROLLER, 1500 kHz SWITCHING FREQ-MAX, PDSO24
封装：	TSSOP-24
文件页数：	3/10页
文件大小：	150K
代理商：	FAN5035MTCX

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PRODUCT SPECIFICATION

FAN5035

REV. 1.0.0 10/31/01

Pin Assignments

Pin Denitions

Pin Number

Pin Name

Pin Function Description

1–5

D0-4

Voltage Identification Code Inputs. These open collector/TTL compatible inputs

will program the output voltage over the ranges specified in Table 1. Pull-up resistors

are internal to the controller.

6–7

IFB_HI

IFB_LO

Current Feedback. These pins are the input for the current feedback control loop.

Layout of these traces is critical to system performance.

VSENSE

Voltage Sense. Pin 8 is used as the input for Power Good and over-voltage

protection.

9VCC

Analog VCC. Connect to system 5V supply and decouple with a 0.1F ceramic

capacitor.

OVP

Over-Voltage Protection. This pin drives an SCR when the output voltage is too

high.

PWRGOOD

Power Good Flag. An open collector output that will be logic LOW if the output

voltage is not within ±10% of the nominal output voltage setpoint.

OUTA

Output. Connect this pin to a driver for an N-channel MOSFET. The trace from this

pin to the driver should be <0.5".

GNDD

Power Ground. Return pin for high currents flowing in pin 12 (OUTA). Connect to a

low impedance ground.

VIN

Input Voltage. Under-voltage detector input.

15–17

A1_INP

A1_INN

A1_OUT

Uncommitted Op Amp.

18–20

A3_INP

A3_INN

A3_OUT

Voltage Feedback Op Amp. This op amp is used for voltage feedback from the

output, and for loop compensation.

VREF

Reference Voltage. Decouple with a 0.1F ceramic capacitor.

GNDA

Analog Ground. Return path for low power analog circuitry. This pin should be

connected to a low impedance system ground plane to minimize ground loops.

EN_SS

Output Enable. A logic LOW on this pin will disable the output. An internal current

source allows for open collector control. This pin also doubles as soft start.

COSC

Oscillator Capacitor. Attach a capacitor from pin 24 to ground to set the oscillator

frequency.