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A7530 Schematic ( PDF Datasheet ) - AiT

Teilenummer A7530
Beschreibung 350KHz PFM STEP-UP DC-DC CONVERTER
Hersteller AiT
Logo AiT Logo 




Gesamt 15 Seiten
A7530 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A7530
350KHz PFM STEP-UP DC-DC CONVERTER
INTERNAL SWITCH W/HIGH EFFICIENCY AND LOW NOISE
DESCRIPTION
FEATURES
A7530 is CMOS-based PFM step-up DC-DC converter.
Deliver 200mA at 3.3V Output Voltage
The converter can start up by supply voltage as low as 0.8V
with 1.8V Input Voltage
input Voltage. Quiescent current drawn from power source
is as low as 7uA. All of these features make A7530 be
suitable for the portable devices, which are supplied by a
single battery to four-cell batteries.
Low start-up voltage(when the output
current is 1mA ) 0.8V
The converter output voltage can be
adjusted from 2.5V~6.0V (In 0.1V step)
To reduce the noise caused by the switch regulator, A7530
is well considerate in circuit design and manufacture. So
that the interferer to other circuits by the device is reduced
greatly.
Output voltage accuracy (±2%)
Low temperature-drift coefficient of the
output voltage (±100ppm/℃)
Only three external components are
necessary: An inductor, a Schottky diode
A7530 integrates stable reference circuits and trimming
technology, so it can afford high precision and low
temperature-drift coefficient of the output voltage.
and an output filter capacitor
High power conversion efficiency (85%)
Low quiescent current drawn from power
source (<7uA)
A7530 can be switch on or off easily by CE pin, to minimize
Available in SOT-25 and SOT-89 package
the standby supply current in SOT-25 package.
APPLICATION
A7530 is available in SOT-25 and SOT-89 packages.
ORDERING INFORMATION
Package
Type
Part Number
SOT-25
E5 A7530E5R-XXY
SOT-89-3
K3 A7530K3R-XXY
Note
XX: Output Voltage
25=2.5V, 33=3.3V…60= 6.0V
Y: Function Type
1: W/O Enable Circuit
2: With Enable Circuit
R: Tape & Reel
AiT provides all Pb free products
Power source for PDA, DSC, MP3 Player,
electronic toy and wireless mouse
Power source for a single or dual-cell
battery-powered equipments
Power source for LED
Typical Application
REV1.2 - JUN 2007 RELEASED – JUN 2008 REVISED -
1
Free Datasheet http://www.Datasheet4U.com






A7530 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A7530
350KHz PFM STEP-UP DC-DC CONVERTER
INTERNAL SWITCH W/HIGH EFFICIENCY AND LOW NOISE
7. Ripple vs. Output Current
A7530K3-251
8. Ripple vs. Output Current
A7530K3-331
9. Ripple vs. Output Current
A7530K3-401
10. Ino Load vs. Input Voltage
A7530K3 (Quiescent Current)
REV1.2 - JUN 2007 RELEASED – JUN 2008 REVISED -
6
Free Datasheet http://www.Datasheet4U.com

6 Page









A7530 pdf, datenblatt
AiT Semiconductor Inc.
www.ait-ic.com
d). Quiescent current test circuit
A7530
350KHz PFM STEP-UP DC-DC CONVERTER
INTERNAL SWITCH W/HIGH EFFICIENCY AND LOW NOISE
Note: VOUT=VOUT x1.05, R=1KΩ, C=0.1Uf
e). Oscillator frequency and duty cycle test circuit
Note: VIN=VOUT x0.95, R=1KΩ
REV1.2 - JUN 2007 RELEASED – JUN 2008 REVISED -
12
Free Datasheet http://www.Datasheet4U.com

12 Page





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