Datasheet > LT8620

LT8620

更新时间： 2024-02-11 19:05:56

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
26页	590K
描述
65V, 2A Synchronous Step-Down Regulator with 2.5Î¼A Quiescent Current

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LT8620 数据手册

LT8620

65V, 2A Synchronous

Step-Down Regulator

with 2.5µA Quiescent

Current

FEATURES

DESCRIPTION

The LT^®8620 is a compact, high efficiency, high speed

synchronous monolithic step-down switching regulator

that accepts a wide input voltage range up to 65V, and

consumesonly2.5µAofquiescentcurrent.Top andbottom

power switches are included with all necessary circuitry

to minimize the need for external components. Low ripple

Burst Mode operation enables high efficiency down to

very low output currents while keeping the output ripple

Wide Input Voltage Range: 3.4V to 65V

Ultralow Quiescent Current Burst Mode^®Operation:

2.5μA I Regulating 12V to 3.3V

P-P

OUT

Output Ripple < 10mV

High Efﬁciency Synchronous Operation:

94% Efﬁciency at 1A, 12V to 5V

92% Efﬁciency at 1A, 12V to 3.3V

OUT

Fast 30ns Minimum Switch-On Time

below 10mV . A SYNC pin allows synchronization to an

Low Dropout Under All Conditions: 250mV at 1A

Safely Tolerates Inductor Saturation in Overload

Low EMI

Adjustable and Synchronizable: 200kHz to 2.2MHz

Accurate 1V Enable Pin Threshold

Internal Compensation

Output Soft-Start and Tracking

Small Thermally Enhanced 16-Lead MSOP and

24-Lead 3mm × 5mm QFN Packages

P-P

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/UV pin has an accurate 1V threshold and can be

usedtoprogramV undervoltagelockoutortoshutdown

the LT8620 reducing the input supply current to 1µA. A

capacitor on the TR/SS pin programs the output voltage

ramp rate during start-up. The PG flag signals when V

OUT

iswithin±±9oftheprogrammedoutputvoltageaswellas

fault conditions. The LT8620 is available in small 16-Lead

MSOPand3mm×5mmQFNpackageswithexposedpads

for low thermal resistance.

APPLICATIONS

Automotive and Industrial Supplies

General Purpose Step-Down

GSM Power Supplies

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.

TYPICAL APPLICATION

Efficiency at 5V_OUT

5V 2A Step-Down Converter

100

BST

5.5V TO 65V

0.1µF

4.7µH

4.7µF

EN/UV

OUT

LT8620

47µF

SYNC

BIAS

10nF

TR/SS

1µF

10pF

INTV

= 700kHz

GND

= 12V

= 24V

60.4k

= 700kHz

243k

0.25 0.5 0.75 1.0 1.25 1.5 1.75 2.0

LOAD CURRENT (A)

8620 TA01a

8620 TA01b

8620fa

For more information www.linear.com/LT8620

12 3 4 5 6 7...26

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与LT8620相关器件

型号	品牌	获取价格	描述	数据表
LT8620_15	Linear	获取价格	65V, 2A Synchronous Step-Down Regulator with 2.5A Quiescent Current
LT8622S	ADI	获取价格	18V, 2A Step-Down Silent Switcher 3 with Ultralow Noise Reference
LT8624S	ADI	获取价格	18V, 4A Step-Down Silent Switcher 3 with Ultralow Noise Reference
LT8625S	ADI	获取价格	具有超低噪声的18V/8A降压型Silent Switcher 3
LT8625SP	ADI	获取价格	具有超低噪声的18V/8A降压型Silent Switcher 3
LT8627SP	ADI	获取价格	具有超低噪声的18V/16A降压型Silent Switcher 3
LT8630	ADI	获取价格	100V、0.6A 同步微功率降压型高效率稳压器
LT8631	ADI	获取价格	100V、1A 同步微功率降压型稳压器
LT8631HFE#PBF	Linear	获取价格	LT8631 - 100V, 1A Synchronous Micropower Step-Down Regulator; Package: TSSOP; Pins: 20; Te
LT8636	ADI	获取价格	42V, 5A/7A Peak Synchronous Step-Down Silent

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