XCM524 Datasheet, PDF (1/52 Pages) Torex Semiconductor – 600mA Synchronous Step-Down DC/DC Converter + 500mA LDO with Delay Function Voltage Detector

XCM524 Series
600mA Synchronous Step-Down DC/DC Converter + 500mA LDO
with Delay Function Voltage Detector
ETR2428-003
˙GENERAL DESCRIPTION
The XCM524 series is a multi combination module IC which comprises of a 600mA driver transistor built-in synchronous
step–down DC/DC converter and a high speed, high current LDO regulator with voltage detector function. The device is
housed in small USP-12B01 package which is ideally suited for space conscious applications. The DC/DC converter and the
LDO blocks are isolated in the package so that noise interference from the DC/DC to the LDO regulator is minimal.
The DC/DC converter block with a built-in 0.42ЊP-channel MOS driver transistor and 0.52ЊN-channel MOS switching
transistor, designed to allow the use of ceramic capacitors. The DC/DC enables a high efficiency, stable power supply with an
output current of 600mA to be configured using only a coil and two capacitors connected externally.
The LDO regulator block is precise, low noise, high ripple rejection, low dropout positive voltage regulators with built-in voltage
detector. The LDO is also compatible with low ESR ceramic output capacitors. Good output stability is maintained during
load fluctuations due to its excellent transient response. The current limiter's fold back circuit also operates as a short circuit
protection for the output current.
The voltage detector block of the contains delay circuit. The delay time can be controlled by an external capacitor.
The detector monitors the input voltage of the voltage regulator.
˙APPLICATIONS
●BD, DVD drives
●HDD drives
●Cameras, Video recorders
●Mobile phones, Smart phones
●Various general-purpose power supplies
˙çTYPICAL APPLICATION CIRCUIT
˙FEATURES
<DC/DC Convertor Block>
Input Voltage Range
: 2.7V ~ 6.0V
Output Voltage Options
: 0.8V ~ 4.0V (±2ˋ)
High Efficiency
: 92% (TYP.)
Output Current
: 600mA (MAX.)
Oscillation Frequency
: 1.2MHz, 3.0MHz (+15%)
Current Limiter Circuit Built-In : Constant Current & Latching
Control Methods
: PWM
PWM/PFM Auto
*Performance depends on external components and wiring on PCB wiring.
<Regulator Block>
Maximum Output Current
: 500mA (Limiter 600mA TYP.)
Dropout Voltage
Operating Voltage Range
(2.5VʽV_ROUTʽ4.9V)
: 200mV@I_ROUT=100mA (TYP.)
: 2.0V ~ 6.0V
Output Voltage Options
: 0.9V ~ 5.1V (0.1V increments, ±2ˋ)
Detect Voltage Options
: 2.0V ~ 5.5V (0.1V increments, ±2ˋ)
VR.VD Temperature Stability :±100ppm/ˆ (TYP.)
High Ripple Rejection
: 65dB (@10kHz)
Low ESR Capacitor
: Ceramic Capacitor
Operating Temperature Range
: -40ˆ ~ +85ˆ
Package
Environmentally Friendly
: USP-12B01
: EU RoHS Compliant, Pb Free
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