XCM519 Datasheet, PDF (1/49 Pages) Torex Semiconductor – 600mA Synchronous Step-Down DC/DC Converter + Low Voltage Input LDO

XCM519 Series
ETR2421-003
600mA Synchronous Step-Down DC/DC Converter + Low Voltage Input LDO
˙GENERAL DESCRIPTION
The XCM519 series is a multi combination module IC which comprises of a 600mA driver transistor built-in synchronous
step–down DC/DC converter and a low voltage input LDO regulator. The device is housed in small USP-12B01 package which
is ideally suited for space conscious applications. Battery operated portable products require high efficiency so that a dual
DC/DC converter is often used. The XCM519 can replace this dual DC/DC to eliminate one inductor and reduce output noise.
The DC/DC converter and the LDO regulator blocks are isolated in the package so that noise interference from the DC/DC to
the LDO regulator is minimal.
A low output voltage and low On-resistance LDO regulator is added in series to the DC/DC output so that one another low output
voltage is created with a high efficiency and low noise. With comparison to the dual DC/DC solution, one inductor can be
eliminated which results in parts reduction and board space saving.
˙APPLICATIONS
˔Mobile phones, Smart phones
˔Bluetooth equipment
˔Portable communication modems
˔Portable game consoles
˙çTYPICAL APPLICATION CIRCUIT
(TOP VIEW)
* The dashed lines denote the connection using
through-holes at the backside of the PC board.
˙TYPICAL PERFORMANCE
CHARACTERISTICS
Dropout Voltage vs. Output Current
V R O UT= 1 .2 V
300
250
200
150
VBIAS=3.0V
VBIAS=3.3V
VBIAS=3.6V
VBIAS=4.2V
VBIAS=5.0V
Ta=25℃
100
50
0
0
100
200
300
400
　Output Current: IOUT(mA)
˙FEATURES
<DC/DC Convertor Block>
Input Voltage Range : 2.7V ~ 6.0V
Output Voltage Range : 0.8V ~ 4.0V
High Efficiency
: 92% (TYP.)
Output Current
: 600mA (MAX.)
Oscillation Frequency : 1.2MHz, 3.0MHz (+15%)
Maximum Duty Cycle : 100%
Soft-Start Circuit Built-In
Current Limiter Circuit(Constant Current & Latching)
Built-In
Control Methods
: PWM (XCM519A)
PWM/PFM Auto (XCM519B)
*Performance depends on external components and wiring on PCB wiring.
<Regulator Block>
Maximum Output Current : 400mA (Limiter 550mA TYP.)
Dropout Voltage
Bias Voltage Range
Input Voltage Range
Output Voltage Range
: 35mV@I_OUT=100mA (TYP.)
(at V_BIAS - V_ROUT(E)=2.4V)
: 2.5V ~ 6.0V (V_BIAS - V_ROUT(E)=0.9V)
: 1.0V ~ 3.0V (V_IN2ʽV_BIAS)
: 0.7V ~ 1.8V (0.05V increments)
High Output Accuracy : ±20mV
Supply Current
Stand-by Current
UVLO
Thermal Shut Down
: I_BIAS=25ЖAçóçI_IN2=1.0ЖA (TYP.)
: I_BIAS=0.01ЖA , I_IN2=0.01ЖA (TYP.)
: V_BIAS=2.0V , V_IN2=0.4V (TYP)
: Detect 150ˆ, Release 125ˆ (TYP.)
Soft-start Time
: 240ЖsˏV_ROUT=1.2V(TYP.)
C_L High Speed Auto-Discharge
ç
Low ESR Capacitor
: Ceramic Capacitor Compatible
Operating Temperature Range : -40ˆ ~ +85ˆ
Package
: USP-12B01
Standard Voltage Combinations : DC/DC
VR
XCM519xx01Dx
1.8V
1.2V
XCM519xx02Dx
1.8V
1.5V
XCM519xx03Dx
1.5V
1.2V
XCM519xx04Dx
1.8V
1.0V
XCM519xx05Dx
1.5V
1.0V
*Other combinations are available as semi-custom products.
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