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XC9515BC10ZL

Description
2 channel Synchronous Step-Down DC/DC Converter with Manual Reset
File Size372KB,22 Pages
Manufacturer
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XC9515BC10ZL Overview

2 channel Synchronous Step-Down DC/DC Converter with Manual Reset

XC9515
Series
2 channel Synchronous Step-Down DC/DC Converter with Manual Reset
ETR0706-008
■GENERAL
DESCRIPTION
The XC9515 series consists of 2 channel synchronous step-down DC/DC converters and a voltage detector with delay circuit
built-in. The DC/DC converter block incorporates a P-channel 0.35Ω (TYP.) driver transistor and a synchronous N-channel
0.35Ω (TYP.) switching transistor. By minimizing ON resistance of the built-in transistors, the XC9515 series can deliver
highly efficient and a stable output current up to 800mA. With high switching frequencies of 1MHz, a choice of small inductor
is possible. The series has a built-in UVLO (under-voltage lock-out) function, therefore, the internal P-channel driver
transistor is forced OFF when input voltage becomes 1.8V or lower (for XC9515A, 2.7V or lower). The voltage detector block
can be set delay time freely by connecting an external capacitor. With the manual reset function, the series can output a
reset signal at any time.
■APPLICATIONS
●DVDs
●Blu-ray
Disk
●LCD
TVs, LCD modules
●Multifunctional
printers
●Photo
printers
●Set
top boxes
■FEATURES
DC/DC Block
Input Voltage Range
Output Voltage
: 2.5V∼5.5V
: V
OUT1
=1.2V∼4.0V
V
OUT2
=1.2V∼4.0V
(Accuracy ±2%)
Oscillation Frequency
: 1MHz (Accuracy ±15%)
High Efficiency
: 95% (V
IN
=5V, V
OUT
=3.3V)
Output Current
: 800mA
Control
: PWM control
Protection Circuits
: Thermal Shutdown
: Integral Latch
(Over
Current Limit)
: Short Protection Circuit
Ceramic Capacitor Compatible
Voltage Detector (VD) Block
Detect Voltage Range
: 2.0∼5.5V(Accuracy ±2%)
Delay Time
: 173 ms
(When Cd=0.1μF is connected)
Output Configuration
: N-channel open drain
Package
: QFN-20
■TYPICAL
APPLICATION CIRCUIT
L1
VOUT1
EN1
VIN
EN2
TYPICAL PERFORMANCE
CHARACTERISTICS
Efficiency vs. Output Current
V
IN
=5V, f
OSC
=1MHz, L=4.7μH (CDRH4D28C)
L=4.7uH(CDRH4D28C),CIN=10uF(ceramic),CL=10uF(ceramic)
VIN=5V,FOSC=1MHz
100
90
80
C
IN
=10μF (ceramic), C
L
=10μF (ceramic)
VOUT=3.3V
LX1
EN1
PVDD
1
EN2
NC
CIN1
NC
CL1
VOUT
1
MR
AVSS
Cd
Efficiency[%]
PVSS
1
NC
PVSS
2
VDOUT
NC
PVDD
2
LX2
NC
NC
MR
70
60
50
40
30
20
10
0
1
VOUT=1.5V
VOUT
2
Cd
RUP
VOUT=1.8V
10
100
Output Current : IOUT [mA]
1000
CIN2
CL2
VDOUT
L2
VOUT2
1/21
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