XC9801/02 Series
Step-Up Charge Pump ICs
March 1, 2003, V6
Input Voltage Range : 1.8V ~ 5.5V
Output Voltage Range : 2.5V ~ 5.2V
Oscillator Frequency : 300kHz
Maximum Output Current : 80mA (3.6→5V step-up)
PFM (pulse skip) Operation During Light Loads (XC9802)
CE (chip enable) Function
MSOP-8A and USP-8 Packages
Applications
Palm top computers, PDAs
On Board Local Power Supplies
Various Battery Powered Devices
General Description
The XC9801 series are fixed regulated voltage step-up charge pump ICs which
provide stable, highly efficient, positive voltages with the only external
components required being 2 capacitors.
Since regulating is done via the control of the charge pump's gate voltage
waveform, ripple is minimal. Output voltage is selectable in 0.1V steps within a
2.5V ~ 5.2V range.
Control of XC9802 switches to PFM (pulse skip) during light loads without
affecting output impedance or ripple so that the IC is protected against drops in
efficiency. Connecting the SENSE pin to the GND pin allows the IC to be used
as a voltage doubler.
As well as the ultra small MSOP-8A and USP-8 packages, the small
consumption current and high efficiencies of the series make the XC9801
suitable for use with all types of battery operated applications.
Features
Input Voltage Range :
1.8V
~
5.5V
Output Voltage Range :
2.5V
~
5.2V
Small Input Current :
80µA (no load:XC9802)
Output Current :
80mA (3.6V→ 5V step-up)
Oscillator Frequency :
300kHz
Stand-By Current (CE 'L') :
2.0µA (max)
Can be used as a Step-Up Doubler (sense = 0V)
MSOP-8A and USP-8 Package
Pin Configuration
SENSE 1
CE 2
VIN 3
GND 4
MSOP-8A
(TOP VIEW)
USP-8
(TOP VIEW)
8 VOUT
7 C1 +
6 C1 -
Pin Assignment
PIN NUMBER
SENSE 1
CE 2
VIN 3
GND 4
8 VOUT
7 C1 +
6 C1 -
5 PGND
MSOP-8A USP-8
PIN NAME
SENSE
CE
VIN
GND
PGND
C1 -
C1 +
VOUT
FUNCTION
Output Voltage Monitor
Chip Enable
Input (power supply)
Ground
Power Ground
External Capacitor
-
External Capacitor +
Output
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Selection Guide
SERIES
XC9801
XC9802
FUNCTION
pulse skip
pulse skip
×
ο
Ordering Information
XC9801/02
DESIGNATOR
B
25~52
3
K
D
R
L
* Avoid the following condition
DESCRIPTION
True Logic Level at CE Pin : Positive
Output Voltage* 5V: standard 2.5V ~ 5.2V: semi-custom
5.0V
→
=5, =0
Oscillator Frequency : 300kHz
Package : MSOP-8A
Package :USP-8
Embossed tape. Standard Feed
Embossed tape. Reverse Feed
VIN < (VOUT/2) or VIN ³ VOUT
1
TOREX [ TOREX SEMICONDUCTOR ]
