Datasheet > ELM91503BA-S

ELM91503BA-S

更新时间： 2024-11-06 11:45:19

品牌	Logo	应用领域
ELM-TECH		转换器控制器
页数	文件大小	规格书
22页	2007K
描述
CMOS PFM Step-up DC/DC converter and controller

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中文翻译

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数据手册

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ELM91503BA-S 数据手册

ELM91xxxxA _{CMOS PFM Step-up DC/DC converter and controller}

■General description

ELM91xx1xA is CMOS PFM control step-up DC-DC converter; ELM91xx3xA is CMOS PFM control step-

up DC-DC controller, which has large output current capacity by using an external FET switch. ELM91 series

consists of reference voltage source, error ampliﬁer, oscillation circuit, start-up circuit, PFM-control circuit,

switching current limit circuit (ELM91xx1xA only), switching transistor (ELM91xx1xA only) and output

voltage setting resistor. For external parts, coil, diode, MOSFET and capacitor are possible choices. The

standard output voltages are 1.8V,3.0V,3.3V,5.0V; ELM91 series can also be designed as semi-custom IC within

the range of 1.8V to 5.5V by 0.1V step.

■Features

■Application

• Output voltage range : 1.8V to 5.5V (by 0.1V)

• Low voltage operation : 0.9V(ELM91xx1xA: Iout=1mA)

• Oscillating frequency : Typ.100kHz

• Constant voltage source for battery-

operated devices

• Portable communication equipments

and video recorders

• Low power operation : Typ.40µW(ELM91301xA: Typ.100kHz)

• High efficiency

• Output current(e.g.) : 100mA(Vin=1.5V, Vout=3.0V)

• Package : SOT-89, SOT-23, SC-70(SOT-323)

: 85%(ELM9130xxA: Vin=1.5V, Iout=10mA)

■Maximum absolute ratings

Parameter

Apply voltage to LX pin

Apply voltage to VOUT pin

Output current of LX pin

Output current of EXT pin

Symbol

Vlx

Vout

Ilx

Limit

Vss-0.3 to 7.0

500

Unit

Iext

500 (SOT-89)

250 (SOT-23)

150 (SC-70)

-40 to +85

-55 to +125

Power dissipation

Operationg temperature

Storage temperature

Top

Tstg

°C

■Selection guide

ELM91xxxxA-x

Symbol

e.g. :

a, b

Output voltage

Switching transistor

Package

18: Vout=1.8V 30: Vout=3.0V

33: Vout=3.3V 50: Vout=5.0V

1: Internal switch

3: External switch

A: SOT-89

B: SOT-23

ELM91 x x x x A - x

↑ ↑ ↑ ↑ ↑ ↑

a b c d e f

C: SC-70(SOT-323)

Product version

Taping direction

S , N: Refer to PKG file

22 - 1

12 3 4 5 6 7...22

中文翻译

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