1

Rev.1.1

15 -

Parameter

Symbol

Limit

Unit

Apply voltage to LX pin

Vlx

Vss-0.3 to 8.0

V

Apply voltage to VOUT pin

Vout

Vss-0.3 to 8.0

V

Output current of LX pin

Ilx

500

mA

Power dissipation

Pd

500 (SOT-89)

mW

250 (SOT-23)

Operating temperature

Top

-40 to +85

°C

Storage temperature

Tstg

-55 to +125

°C

ELM95xxxxE is CMOS PWM step-up DC/DC converter which consists of reference voltage source, error

amplifier, oscillation circuit, start-up circuit, PWM control circuit, switching current limit circuit, switch

transistor and output voltage setting resistor. For external parts, coil, diode and capacitor are possible choices;

with external parts, are 2.7V, 3.0V, 3.3V and 5.0V; ELM95 series can also be designed as semi-custom IC within

the range of 2.5V to 5.5V by 0.1V step. With newly-developed PWM control circuit, ELM95 series is able to

modulate switching time smoothly with constant frequency and consequently generates stable output with small

ripples.There are two switching frequency and maximum duty ratio available:(Switching frequency, Maximum

duty ratio)=(55kHz, 60%) and (100kHz, 77%).

• Constant voltage source for battery-operated devices

• Constant voltage source for cameras

• Portable communication equipments

• Local regulator

■General description

■Features

■Application

■Maximum absolute ratings

• Output voltage range

: 2.5V to 5.5V(by 0.1V step)

• Low voltage operation

: Vin≥0.9V(No load)

• Low power operation

: 35µW(ELM9530AxE)

• High efficiency

: Typ.85%

• High output voltage accuracy

: ±2.5%

• Constant switching frequency : Typ.55kHz(Type A), Typ.100kHz(Type B)

• Output current (e.g.)

: 100mA(Type B, Vin=1.5V, Vout=3.3V)

• Small ripples

: Ceramic capacitor can be used for output capacitor.

• Package

: SOT-89, SOT-23