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XC9110A181PL

Description
PFM Controlled Step-Up DC/DC Converter / Controller ICs
File Size2MB,35 Pages
ManufacturerTOREX
Websitehttp://www.torex.co.jp/chinese/
Download Datasheet View All

XC9110A181PL Overview

PFM Controlled Step-Up DC/DC Converter / Controller ICs

XC9110/XC9111
Series
PFM Controlled Step-Up DC/DC Converter / Controller ICs
ETR0406 004
The XC9110/9111 series is a group of PFM controlled step-up DC/DC converter/controller ICs designed to generate low supply
voltage by the combination of PFM control and CMOS structure. The series is ideal for applications where a longer battery life is
needed such as in portable communication equipment. With a built-in 2.5ΩN-channel driver transistor, the XC9110A/C/E and
XC9111A/C/E types provide a step-up operation by using only a coil, a capacitor, and a diode connected externally.
The XC9110/9111B, D and F versions can be used with an external transistor for applications requiring larger currents.
Output voltage is internally programmable in a range from 1.5V to 7.0V in increments of 100mV (accuracy:±2.5%).
Maximum oscillation frequency is set to 100kHz for XC9110/9111 series. (At light loads, it is set to 180kHz for the XC9111
series.) Options include products equipped with a CE pin (C and D versions) that allows the IC to be shut down thereby
reducing supply current and with separated V
DD
/V
OUT
pins (E and F versions) to separate the power supply block and the
output voltage detect block. With the XC9110 series, maximum duty cycle is set to 75% (V
DD
=3.3V) making it suitable for
use with large current operations. The XC9111 series automatically switches duty ratio between 56% & 75% (V
DD
=3.3V)
when it senses changes in load to drop output ripple voltage and can support both large and small currents. The external
transistor types (B/D/F types) can be provided for applications, which require larger currents.
■GENERAL
DESCRIPTION
■APPLICATIONS
●Mobile
phones
●Various
palm top equipment
●Cameras,
VCRs
●Various
portable equipment
■FEATURES
Operating (Input) Voltage Range
: 0.9V ~ 10.0V
Output Voltage Range
: 1.5V~7.0V
(100mV increments,
accuracy
±2.5%)
Maximum Oscillation Frequency
: 100kHz (accuracy
±15%)
180kHz (for the XC9111 series,
duty ratio: 56% at light loads)
Built-in Switching N-ch Transistor
: A/C/E type
ON Resistance 2.5Ω
(V
DD
=3.0V)
External Transistor Types
: B/D/F type
Lx Limit Voltage
: E type: more than V
DD
=2.0V
: A/C type: more than V
OUT
=2.0V
Low Supply Current
: 2.0μA
(When operating, VOUT=3V)
Small Package
: SOT-23 & SOT89
(for XC9111 series),
SOT-25, USP-6C
■TYPICAL
APPLICATION CIRCUIT
●C
type circuit
TYPICAL PERFORMANCE
CHARACTERISTICS
100
XC9111E331MR
L=100μH(CR54), CL47μF(Tantalum)
SD: XB01SB04A2BR
L
5
4
80
Efficiency:EFFI(%)
(TOP VIEW)
SOT-25
VIN +
CIN
1
2
3
VOUT
SD
+
CL
(Tantalum)
3.0V
60
1.5V
40
1.2V
VIN=0.9V
20
2.4V
GND
CE
0
0
50
1 00
150
2 00
Output Current:IOUT(mA)
250
3 00
1/35
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