SG2001 查看數據表（PDF） - Unspecified

零件编号

产品描述 (功能)

生产厂家

SG2001

150mA, Low Power, Low Noise, Low Dropout,Linear Regulators

Unspecified 

TYPICAL OPERATING CHARACTERISTICS

VIN = VOUT(NOMINAL) + 0.5V or 2.5V (whichever is greater), CIN = 1µF, COUT = 1µF, CBP = 0.01µF, TA = +25℃, unless otherwise noted.

Start Up

6

4

2

0

2

1

VIN = 5V

0

VOUT = 2.5V

CIN = COUT = 1μF

ILOAD = 1mA

Time(10μs/div)

Application Notes

When LDO is used in handheld products, Attention must be paid to voltage spike which would damage

SG2001. In such applications, voltage spike will be generated at changer interface and VBUS pin of USB

interface when changer adapters and USB equipments are hot-inserted. Besides this, handheld products will

be tested on the production line on the condition of no battery. Test Engineer will apply power from the

connector pin which connects with positive pole of the battery. When external power supply is turned on

suddenly, the voltage spike will be generated at the battery connector. The voltage spike will be very high, it

always exceeds the absolute maximum input voltage (6.0V) of LDO. In order to get robust design. Design

Engineer needs to clear up this voltage spike. Zener diode is a cheap and effective solution to eliminate such

voltage spike. For example, BZM55B5V6 is a 5.6V small package Zener diode which can be used to

remove voltage spike in cell phone design. The schematic is shown in below:

Vcc

Input

BZM55B5V6

1 IN

1uF

C1

EN

3

Control

SG2001

GND

2

VOUT

5

C2

BP/FP

4

0.01uF

4.7uF

VOUT

９

SG2001/A

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