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ELM9327AB-S Datasheet, PDF (1/8 Pages) ELM Technology Corporation – CMOS High efficiency PFM step-up DC/DC converter | |||
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ELM93xxxB CMOS High efficiency PFM step-up DC/DC converter
â General description
ELM93xxxB is CMOS step-up DC/DC converter which consists of reference voltage source, error ampliï¬er,
oscillation circuit, start-up circuit, PFM control circuit, switching transistor and output voltage setting resistor.
For external parts, coil, diode and capacitor are possible choices; with external parts, ELM93 series is able to
acquire constant output voltage higher than input voltage. The standard output voltages are 2.7V, 3.0V, and 3.3V;
ELM93 series can also be designed as semi-custom IC within the range of 1.8V to 3.8V by 0.1V step.
â Features
⢠Output voltage range
⢠Low voltage operation
⢠Low power operation
⢠High efï¬ciency
⢠High output voltage accuracy
⢠Output current (e.g.)
⢠Package
: 1.8V to 3.8V (by 0.1V)
: Vinâ¥0.9V (RL=30kΩ)
: 24μW (Typ. ELM9330xB)
: Typ. 85%
: ±2.5%
: 40mA
(When Vin=1.5V, Vout=3.0V)
: SOT-89, SOT-23
â Application
⢠Constant voltage source for battery-
operated devices
⢠Constant voltage source for cameras
⢠Portable communications equipments
⢠Local regulator
â Maximum absolute ratings
Parameter
Apply voltage to LX pin
Apply voltage to VOUT pin
Output current of LX pin
Power dissipation
Operating temperature
Storage temperature
Symbol
Limit
Unit
Vlx
5
V
Vout
4
V
Ilx
200
mA
Pd
300 (SOT-89)
200 (SOT-23)
mW
Top
-40 to +85
°C
Tstg
-55 to +125
°C
â Selection guide
ELM93xxxB-x
Symbol
a, b
Output voltage
c
Package
d
Product version
e
Taping direction
e.g. :
27: Vout=2.7V 30: Vout=3.0V
33: Vout=3.3V
A: SOT-89
B: SOT-23
B
S : Refer to PKG file
N : Refer to PKG file
ELM93 x x x B - x
âââ â â
abc d e
8-1
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