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Anachip - PWM/PFM Dual Mode Step-up DC/DC Controller

Numéro de référence AP1624
Description PWM/PFM Dual Mode Step-up DC/DC Controller
Fabricant Anachip 
Logo Anachip 





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AP1624 fiche technique
PWM/PFM Dual Mode Step-up DC/DC Controller
AP1624
„ Features
- Input Voltage Range: 0.9~6V
- PWM/PFM Switching Control
- High Efficiency: 90%
- Oscillator Frequency: 300kHz(±15%
- Stand-by Current: ISTB=3µA.Typ.
- Pb-Free Package: SOT23-5
„ Applications
- Electronic Information Organizers
- Palmtops
- Cellular and portable phones
- Portable Audio Systems
- Various Multi-function Power Supplies
„ General Descriptions
The AP1624 is multi-functional step-up DC/DC
controllers. Large output current is possible using
an externally connected N channel MOSFET, coil,
and diode.
Output voltage VOUTis programmable with 1.23V
of standard voltage supply internal, and using
externally connected components, output voltage
FBcan be set up at will.
With a 300KHz switching frequency, the size of the
external components can be reduced.
Control switches from PFM to PWM during light
loads with the AP1624PFM/PWM switchableand
the series is highly efficient from light loads to large
output currents.
During stand-by time CE pin “Low”, current
consumption is reduced to 3µA.
„ Pin Assignment
„ Pin Descriptions
(TOP VIEW)
EXT GND
54
123
FB VCC CE
SOT23-5
Pin Pin
No. Name
Function
1 FB Feedback pin
2 VCC IC Power Supply pin
Chip Enable:
3 CE
H: Enable
L: Disable
4 GND GND pin
5 EXT External N-MOSFET Connection
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of
this product. No rights under any patent accompany the sale of the product.
Rev.1.1 Dec.23, 2004
1/7

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