XC9260 Datasheet, PDF (1/28 Pages) Torex Semiconductor – COT Control, 1.5A Synchronous Step-Down DC/DC Converters

XC9260/XC9261Series
COT Control, 1.5A Synchronous Step-Down DC/DC Converters
ETR05042-001
■GENERAL DESCRIPTION
☆GreenOperation-compatible
The XC9260/XC9261 series is a group of synchronous-rectification type DC/DC converters with a built-in P-channel MOS driver
transistor and N-channel MOS switching transistor, designed to allow the use of ceramic capacitors. Output voltage is internally
set in a range from 0.8V to 3.6V (accuracy: ±2.0%) increments of 0.05V. The device provides a high efficiency, stable power
supply with an output current of 1.5A to be configured using only a coil and two capacitors connected externally. Oscillation
frequency is set to 1.2MHz or 3.0MHz can be selected for suiting to your particular application.
As for operation mode HiSAT-COT ^(*) control excellent in transient response, the XC9260 series is PWM control, the XC9261
series is automatic PWM/PFM switching control, allowing fast response, low ripple and high efficiency over the full range of loads
(from light load to heavy load).
During stand-by, all circuits are shutdown to reduce current consumption to as low as 1.0μA or less. As for the soft-start function
as fast as 0.3ms in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock Out) function, the internal P-channel MOS
driver transistor is forced OFF when input voltage becomes 2.00V or lower. The B types integrate C_L High Speed discharge
function which enables the electric charge at the output capacitor C_L to be discharged via the internal discharge.
Two types of package SOT-89-5, USP-6C are available.
(*) _{HiSAT-COT is an original Torex term for High Speed Transient Response.}
■APPLICATIONS
●Mobile phones
■FEATURES
Input Voltage Range
Output Voltage Range
: 2.7V～5.5V
: 0.8V～3.6V (±2.0%)
●Bluetooth headsets
●Smart phones, Personal digital assistance
●Portable game consoles
●Digital still cameras, Camcorders
●Codeless phones
Quiescent Current
Output Current
Oscillation Frequency
Efficiency
Control Methods
: 25μA (f_OSC=3.0MHz)
: 1.5A
: 1.2MHz, 3.0MHz
90%
:
(V_IN=3.7V, V_OUT=1.8V, I_OUT=200mA)
: HiSAT-COT Control
: 100% Duty Cycle
●Point-of-Load (POL)
: PWM Control (XC9260)
: PWM/PFM Auto (XC9261)
Protection Circuits
: Thermal Shutdown
: Current Limit (Pendent character)
: Short Circuit Protection (Type B)
Functions
: Soft-Start
: UVLO
Capacitor
: C_L High Speed Discharge (Type B)
: Ceramic Capacitor
Operating Ambient Temperature : - 40℃ ～ + 105℃
Packages
: SOT-89-5, USP-6C
Environmentally Friendly
: EU RoHS Compliant, Pb Free
■TYPICAL APPLICATION CIRCUIT _{■TYPICAL PERFORMANCE}
CHARACTERISTICS
XC9260A18D / XC9261A18D
VIN
CIN
VIN
CE
CE
PGND
Lx
VOUT
AGND
L
VOUT
1.5A
CL
L = LQM2MPN1R0MGH(1.0μH)
C_IN=10_μF(GRM155R61A106M) C_L=10_μF(GRM155R61A106M)
100
90
80
70
60
50
40
30
20
10
0
0.1
VIN = 5.0V
VIN = 3.7V
XC9261
XC9260
VIN = 5.0V
VIN = 3.7V
1
10
100 1000 10000
Output Current: I_OUT (mA)
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