Datasheet > LTC1929_1

LTC1929_1

更新时间： 2024-09-24 05:43:43

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
28页	312K
描述
2-Phase, High Efficiency,Synchronous Step-Down Switching Regulators

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LTC1929_1 数据手册

LTC1929/LTC1929-PG

2-Phase, High Efficiency,

Synchronous Step-Down

Switching Regulators

FEATURES

DESCRIPTIO

The LTC^®1929/LTC1929-PG are 2-phase, single output,

synchronous step-down current mode switching regula-

torcontrollersthatdriveN-channelexternalpowerMOSFET

stages in a phase-lockable fixed frequency architecture.

The 2-phase controllers drive their two output stages out

of phase at frequencies up to 300kHz to minimize the RMS

ripple currents in both input and output capacitors. The

2-phase technique effectively multiplies the fundamental

frequency by two, improving transient response while

operating each channel at an optimum frequency for

efficiency. Thermal design is also simplified.

■

2-Phase Single Output Controller

■

Reduces Required Input Capacitance and Power

Supply Induced Noise

■

Current Mode Control Ensures Current Sharing

■

Phase-Lockable Fixed Frequency: 150kHz to 300kHz

■

True Remote Sensing Differential Amplifier

OPTI-LOOP^TMCompensation Improves Transient

■

Response

■

1% Output Voltage Accuracy

■

Power Good Output Voltage Monitor (LTC1929-PG)

Wide V_INRange: 4V to 36V Operation

Very Low Dropout Operation: 99% Duty Cycle

Adjustable Soft-Start Current Ramping

Internal Current Foldback

Short-Circuit Shutdown Timer with Defeat Option

Overvoltage Soft-Latch Eliminates Nuisance Trips

An internal differential amplifier provides true remote

sensing of the regulated supply’s positive and negative

output terminals as required by high current applications.

The RUN/SS pin provides soft-start and a defeatable,

timed, latched short-circuit shutdown to shut down both

channels. Internal foldback current limit provides protec-

tion for the external synchronous MOSFETs in the event of

an output fault. OPTI-LOOP compensation allows the

transient response to be optimized over a wide range of

output capacitance and ESR values.

^{Available in 28-L}U^{ead SSOP Package}

APPLICATIO S

■

Desktop Computers

■

Internet/Network Servers

■

Large Memory Arrays

, LTC and LT are registered trademarks of Linear Technology Corporation.

OPTI-LOOP is a trademark of Linear Technology Corporation.

■

DC Power Distribution Systems

TYPICAL APPLICATIO

10Ω

5V TO 28V

10µF

35V

0.1µF

CERAMIC

×4

TG1

BOOST1

SW1

0.1µF

0.47µF

LTC1929

1µH

0.002Ω

RUN/SS

BG1

PGND

1000pF

SENSE1

–

10k

100pF

16k

TG2

BOOST2

SW2

SGND

OUT

0.47µF

1.6V/40A

1µH

0.002Ω

BG2

DIFFOUT

EAIN

–

INTV

10µF

OUT

SENSE2

1000µF

16k

–

×2

OUT

: T510E108K004AS L1, L2: CEPH149-1ROMC

1929 F01

Figure 1. High Current 2-Phase Step-Down Converter

12 3 4 5 6 7...28

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与LTC1929_1相关器件

型号	品牌	获取价格	描述	数据表
LTC1929_15	Linear	获取价格	2-Phase, High Efficiency, Synchronous Step-Down Switching Regulators
LTC1929C	Linear	获取价格	2-Phase, High Efficiency, Synchronous Step-Down Switching Regulator
LTC1929CG	Linear	获取价格	2-Phase, High Efficiency, Synchronous Step-Down Switching Regulator
LTC1929CG#PBF	Linear	获取价格	LTC1929 - 2-Phase, High Efficiency, Synchronous Step-DownSwitching Regulators; Package: SS
LTC1929CG#TR	Linear	获取价格	LTC1929 - 2-Phase, High Efficiency, Synchronous Step-DownSwitching Regulators; Package: SS
LTC1929CG#TRPBF	Linear	获取价格	LTC1929 - 2-Phase, High Efficiency, Synchronous Step-DownSwitching Regulators; Package: SS
LTC1929CG-PG	Linear	获取价格	2-Phase, High Efficiency,Synchronous Step-Down Switching Regulators
LTC1929CG-PG#PBF	Linear	获取价格	LTC1929 - 2-Phase, High Efficiency, Synchronous Step-DownSwitching Regulators; Package: SS
LTC1929CG-PG#TR	Linear	获取价格	LTC1929 - 2-Phase, High Efficiency, Synchronous Step-DownSwitching Regulators; Package: SS
LTC1929CG-PG#TRPBF	Linear	获取价格	暂无描述

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