Datasheet > LT8616

LT8616

更新时间： 2023-12-20 18:44:36

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
26页	433K
描述
具 6.5μA 静态电流的双通道 42V 同步单片式降压型稳压器

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LT8616 数据手册

LT8616

Dual 42V Synchronous

Monolithic Step-Down Regulator

with 6.5µA Quiescent Current

FEATURES

DESCRIPTION

TheLT^®8616isahighefficiency,highspeed,dualsynchro-

Wide Input Voltage Range: 3.4V to 42V

2.5A and 1.5A Buck Regulators with Separate Inputs

Fast Minimum Switch On-Time: 35ns

nous monolithic step-down switching regulator that con-

sumesonly6.5µA ofquiescentcurrentwithbothchannels

enabled.Bothchannelscontainallswitchesandnecessary

circuitry to minimize the need for external components.

Low ripple Burst Mode operation enables high efficiency

down to very low output currents while minimizing output

ripple. A SYNC pin allows synchronization to an external

clock. Internal compensation with peak current mode

topology allows the use of small inductors and results in

fast transient response and good loop stability. The en-

able pins have accurate 1V thresholds and can be used to

program undervoltage lockout. Capacitors on the TR/SS

pins programs the output voltage ramp rate during start-

up while the PG pins signal when each output is within

10% of the programmed output voltage. The LT8616 is

available in a TSSOP package for high reliability.

Ultralow Quiescent Current Burst Mode^®Operation:

6.5µA I Regulating 12V to 5V

and 3.3V

OUT

Output Ripple < 15mV

180° Out of Phase Switching

Adjustable: 200kHz to 3MHz

Synchronizable: 250kHz to 3MHz

Accurate 1V Enable Pin Thresholds

Internal Compensation

Output Soft-Start and Tracking

TSSOP Package: Output Stays at or Below Regulation

Voltage During Adjacent Pin Short or When a Pin Is

Left Floating

Thermally Enhanced 28-Lead TSSOP and

3mm × 6mm QFN Packages

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

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

owners.

APPLICATIONS

Automotive and Industrial Supplies

General Purpose Step-Down

TYPICAL APPLICATION

5V, 3.3V, 700kHz Step-Down Converter

Efficiency

100

BOOST1

IN1

12V

0.1µF

10µH

4.7µF

EN/UV1

OUT1

= V = 12V

IN2

= 700kHz

SW1

FB1

IN1

5V, 1.5A

IN2

5.6pF

47µF

EN/UV2

187k

LT8616

PG1

PG2

SYNC/MODE

BIAS

10nF

BOOST2

CH1, 5V

OUT

0.1µF

4.7µH

TR/SS1

TR/SS2

INTV

CH2, 3.3V

1µF

OUT2

0.01

0.1

100

1000

SW2

FB2

3.3V, 2.5A

LOAD (mA)

10pF

56.2k

8616 TA01b

GND

316k

2 x 47µF

8616 TA01a

8616fa

For more information www.linear.com/LT8616

12 3 4 5 6 7...26

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