
5. C harge Pump ICs
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52
XC9801 Series
Step-Up Charge Pump
General Description
Features
The XC 9801 series are step-up charge pump IC s which
provide stable, highly efficient, positive voltages with the only
external components required being 2 capacitors. Output
voltage is selectable in 0.1V steps within a 2.5V ~ 5.2V range
and with output stabilised through the control of the charge
pump's output impedance, ripple is minimal.
Control switches to PFM (pulse skip) during light loads
without affecting output impedance or ripple so that the IC is
protected against drops in efficiency.
As well as the ultra small MSOP-8 package, the small con-
sumption current and high efficiencies of the series make the
XC 9801 suitable for use with all types of battery operated ap-
plications.
Input Voltage Range:
1.8V ~ 5.5V
Output Voltage Range:
2.5V ~ 5.2V
Small Input Current:
80
μ
A (no load)
Output Current:
80mA (3.6V
Oscillation Frequency:
300kHz
Stand-By Current (CE 'L'):
2.0
μ
A (max)
Can be used as a Step-Up Doubler (sense = 0V)
MSOP-8A Package
5V step-up)
Pin Configuration
Pin Assignment
SENS E
CE
V
IN
GND
V
OUT
C1+
C1-
PGND
MSOP-8A
(TOP VIEW)
PIN
NUMBER
1
2
PIN
NAME
SENSE
C E
FUNC TION
Output Voltage Monitor
Chip Enable
3
V
IN
Input (power supply)
4
GND
Ground
5
PGND
Power Ground
6
C 1 -
External Capacitor -
7
C 1 +
External Capacitor +
8
V
OUT
Output
Block Diagram
V
IN
C E
C 1+
C 1-
V
OUT
SENSE
GND
PGND
C hip
Enable
Oscillator
Vref
C ontroler
P1
P2
P3
N4
N5
Ordering Information
XC 9801/02
DESIGNATOR
DESC RIPTION
B
True Logic Level at C E Pin : Positive
Output Voltage (2.5V ~ 5.2V)
5.0V
=5,
Oscillator Frequency : 300kHz
Package : MSOP-8A (1reel = 1000pcs)
Embossed tape. Standard Feed
Embossed tape. Reverse Feed
25~52
=0
3
K
R
L
DETAILS