Datasheet > RH1959

RH1959

更新时间： 2024-11-10 14:58:27

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
2页	96K
描述
Radiation Hardened 4.5A, 500kHz Step-Down Switching Regulator

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RH1959 数据手册

DICE/DWF SPECIFICATION

RH1959MILDICE

4.5A, 500KHz Step-Down

Switching Regulator

PAD FUNCTION

DIE CROSS REFERENCE

1. GND

2. VC

LTC Finished

Order

Part Number

3. SHDN

4. FB

RH1959MK

RH1959MILDICE

RH1959MILDWF*

5. SYNC

6. BOOST

7. V_IN

Please refer to LTC standard product data sheet for

other applicable product information.

*DWF = DICE in wafer form.

8. SW

80mils × 138mils,

Backside metal: Alloyed gold layer

Backside potential: GND

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

DESCRIPTION

The RH1959 is a 500kHz monolithic buck mode switching

regulator with an on-die 4.5A switch. It can accept inputs

bipolar process and new design techniques achieve high

efficiency at high switching frequency. High efficiency is

maintained over a wide output current range by keeping

quiescent supply current to 4mA and by utilizing a boost

capacitor to saturate the NPN power switch. Full cycle-

by-cycle short-circuit protection and thermal shutdown

are provided for safe operation in overload conditions.

A shutdown signal reduces supply current to 20µA while

synchronizationallowsanexternallogiclevelsignaltovary

adjust switching frequency between 580kHz and 1MHz.

up to 16V to generate outputs as low as 1.21V . All

OUT

necessary circuitry including oscillator, control logic,

comparators, error amplifiers, and reference are included

on die, keeping solution size minimal and saving external

components. High switching frequency allows a consid-

erable reduction in the size of external capacitors and

inductor. The topology is current mode for fast transient

response and good loop stability. A special high speed

ABSOLUTE MAXIMUM RATINGS

(Note 1)

Input Voltage.............................................................16V

Boost Voltage............................................................30V

Boost Pin Above Input Voltage..................................15V

SHDN Pin Voltage .......................................................7V

FB Pin Voltage..........................................................3.5V

FB Pin Current..........................................................1mA

SYNC Pin Voltage........................................................7V

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

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与RH1959相关器件

型号	品牌	获取价格	描述	数据表
RH1959MILDICE	Linear	获取价格	4.5A, 500KHz Step-Down Switching Regulator
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RH1A	EIC	获取价格	FAST RECOVERY RECTIFIER DIODES
RH1AV	SANKEN	获取价格	Rectifier Diode, 1 Element, 0.6A, Silicon
RH1AV4	SANKEN	获取价格	Rectifier Diode, 1 Element, 0.6A, Silicon
RH1AVO	SANKEN	获取价格	Rectifier Diode, 1 Element, 0.6A, Silicon
RH1AW	SANKEN	获取价格	Rectifier Diode, 1 Element, 0.6A, Silicon

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