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MAX1992

更新时间： 2024-01-18 22:11:54

品牌	Logo	应用领域
美信 - MAXIM		控制器
页数	文件大小	规格书
36页	535K
描述
Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Voltages

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数据手册

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MAX1992 数据手册

19-2661; Rev 0; 10/02

Quic k-PWM Ste p-Dow n Controlle rs w ith Induc tor

Sa tura tion Prote c tion a nd Dyna m ic Output Volta ge s

Ge n e ra l De s c rip t io n

Fe a t u re s

The MAX1992/MAX1993 pulse-width modulation (PWM)

controllers provide high-efficiency, excellent transient

response, and high DC output accuracy. The devices

s te p d own hig h-volta g e b a tte rie s to g e ne ra te low-

voltage CPU core or chipset/RAM supplies in notebook

computers.

ꢀ Inductor Saturation Protection

ꢀ Accurate Current Limit

ꢀ Ultra-High Efficiency

ꢀ Quick-PWM with 100ns Load-Step Response

ꢀ MAX1992

Maxim’s proprietary Quick-PWM™ quick-response, con-

s ta nt on-time PWM c ontrol s c he me ha nd le s wid e

input/output voltage ratios with ease and provides 100ns

“instant-on” response to load transients, while maintaining

a relatively constant switching frequency. Efficiency is

enhanced by the ability to drive very large synchronous-

rectifier MOSFETs. Current sensing to ensure reliable

overload and inductor saturation protection is available

using an external current-sense resistor in series with the

output. Alternatively, the controller can sense the current

across the synchronous rectifier alone or use lossless

inductor sensing for lowest power dissipation.

1.8V/2.5V Fixed or 0.7V to 5.5V Adjustable

Output Range

ꢀ MAX1993

External Reference Input

Dynamically Selectable Output Voltage

(0.7V to 5.5V)

Optional Power-Good and Fault Blanking

During Transitions

ꢀ ±1% V

Accuracy Over Line and Load

OUT

ꢀ 2V to 28V Battery Input Range (V )

Single-stage buck conversion allows the MAX1992/

MAX1993 to directly step down high-voltage batteries for

the highest possible efficiency. Alternatively, two-stage

conversion (stepping down from another system supply

rail instead of the battery) at the maximum switching fre-

quency allows the minimum possible physical size.

ꢀ 200/300/450/600kHz Switching Frequency

ꢀ Overvoltage/Undervoltage Protection Option

ꢀ 1.7ms Digital Soft-Start

ꢀ Drives Large Synchronous Rectifier FETs

ꢀ 2V ±0.7% Reference Output

The MAX1992 powers the CPU core, chipset, DRAM, or

other supply rails as low as 0.7V. The MAX1993 powers

chipsets and graphics processor cores, which require

dynamically adjustable output voltages. The MAX1993

provides a tracking input that can be used for active ter-

mination buses. The MAX1992/MAX1993 are available in

a 24-pin thin QFN package with optional overvoltage and

undervoltage protection.

ꢀ Power-Good Window Comparator

Ord e rin g In fo rm a t io n

PART

TEMP RANGE PIN-PACKAGE

MAX1992ETG

MAX1993ETG

-40°C to +85°C 24 Thin QFN 4mm × 4mm

For dual step-down PWM controllers with inductor satu-

ration protection, external reference input voltage, and

dynamically selectable output voltages, refer to the

MAX1540/MAX1541 data sheet.

P in Co n fig u ra t io n s

TOP VIEW

Ap p lic a t io n s

Notebook Computers

24 23 22

21 20

TON

N.C.

18 DL

Core/IO Supplies as Low as 0.7V

1.8V and 2.5V Supplies

BST

LSAT

MAX1992

PGOOD

ILIM

15 DH

DDR Memory Termination (MAX1993)

Active Termination Buses (MAX1993)

V+

REF

SKIP

CPU/Chipset/GPU with Dynamic Voltage Cores

(MAX1993)

10 11 12

24-PIN THIN QFN

4mm x 4mm

Pin Configurations continued at end of data sheet.

Quick-PWM is a trademark of Maxim Integrated Products, Inc.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

12 3 4 5 6 7...36

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与MAX1992相关器件

型号	品牌	获取价格	描述	数据表
MAX1992_05	MAXIM	获取价格	Quick-PWM Step-Down Controllers
MAX1992ETG	MAXIM	获取价格	Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Vol
MAX1992ETG+	MAXIM	获取价格	Quick-PWM Step-Down Controllers
MAX1992ETG-T	MAXIM	获取价格	Switching Controller, Current-mode, 600kHz Switching Freq-Max, BICMOS, 4 X 4 MM, 0.8 MM HE
MAX1993	MAXIM	获取价格	Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Vol
MAX1993	ADI	获取价格	Quick-PWM降压型控制器，带有电感饱和保护和动态输出电压
MAX1993ETG	MAXIM	获取价格	Quick-PWM Step-Down Controllers with Inductor Saturation Protection and Dynamic Output Vol
MAX1993ETG+	MAXIM	获取价格	Quick-PWM Step-Down Controllers
MAX1993ETG+T	MAXIM	获取价格	Switching Controller, Current-mode, 600kHz Switching Freq-Max, BICMOS, 4 X 4 MM, 0.80 MM H
MAX1993ETG-T	MAXIM	获取价格	Switching Controller, Current-mode, 600kHz Switching Freq-Max, BICMOS, 4 X 4 MM, 0.8 MM HE

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