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ELM91301AA-S Datasheet(PDF) 1 Page - ELM Technology Corporation

Part # ELM91301AA-S
Description  CMOS PFM Step-up DC/DC converter and controller
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Manufacturer  ELM-TECH [ELM Technology Corporation]
Direct Link  http://www.elm-tech.com
Logo ELM-TECH - ELM Technology Corporation

ELM91301AA-S Datasheet(HTML) 1 Page - ELM Technology Corporation

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ELM91xxxxA CMOS PFM Step-up DC/DC converter and controller
■General description
Parameter
Symbol
Limit
Unit
Apply voltage to LX pin
Vlx
Vss-0.3 to 7.0
V
Apply voltage to VOUT pin
Vout
Vss-0.3 to 7.0
V
Output current of LX pin
Ilx
500
mA
Output current of EXT pin
Iext
20
mA
Power dissipation
Pd
500 (SOT-89)
mW
250 (SOT-23)
150 (SC-70)
Operationg temperature
Top
-40 to +85
°C
Storage temperature
Tstg
-55 to +125
°C
• Output voltage range : 1.8V to 5.5V (by 0.1V)
• Low voltage operation : 0.9V(ELM91xx1xA: Iout=1mA)
• Oscillating frequency : Typ.100kHz
• Low power operation : Typ.40µW(ELM91301xA: Typ.100kHz)
• High efficiency
: 85%(ELM9130xxA: Vin=1.5V, Iout=10mA)
• Output current(e.g.)
: 100mA(Vin=1.5V, Vout=3.0V)
• Package
: SOT-89, SOT-23, SC-70(SOT-323)
• Constant voltage source for battery-
operated devices
• Portable communication equipments
and video recorders
ELM91xxxxA-x
Symbol
a, b
Output voltage
e.g. :
18: Vout=1.8V 30: Vout=3.0V
33: Vout=3.3V 50: Vout=5.0V
c
Switching transistor 1: Internal switch
3: External switch
d
Package
A: SOT-89
B: SOT-23
C: SC-70(SOT-323)
e
Product version
A
f
Taping direction
S , N: Refer to PKG file
ELM91 x x x x A - x
↑ ↑ ↑ ↑ ↑ ↑
a b c d e f
■Features
■Maximum absolute ratings
■Selection guide
■Application
22 -
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.


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