XC9260/XC9261
Series
ETR05042-002a
COT Control, 1.5A Synchronous Step-Down DC/DC Converters
■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 1.0μ or less. As for the soft-start function
A
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
●Communication
equipment /
Communication
Module
(Bluetooth/Wi-Fi/GPS）
●MCU/FPGA/ASIC
f
or power supplies (POL)
●Smart
phones / Mobile phones
●DSC/Camcorder
■FEATURES
Input Voltage Range
Output Voltage Range
Quiescent Current
Output Current
Oscillation Frequency
Efficiency
Control Methods
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
:
2.7V½5.5V
0.8V½3.6V (±2.0%)
25μ (f
OSC
=3.0MHz)
A
1.5A
1.2MHz, 3.0MHz
90%
(V
IN
=3.7V, V
OUT
=1.8V, I
OUT
=200mA)
HiSAT-COT Control
100% Duty Cycle
PWM Control (XC9260)
PWM/PFM Auto (XC9261)
Thermal Shutdown
Current Limit (Pendent character)
Short Circuit Protection (Type B)
Soft-Start
UVLO
C
L
High Speed Discharge (Type B)
Ceramic Capacitor
- 40℃
½
+ 105℃
SOT-89-5, USP-6C
EU RoHS Compliant, Pb Free
Protection Circuits
Functions
Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
XC9260A18D / XC9261A18D
L = LQM2MPN1R0MGH(1.0
μ
H)
C
IN
=10
μ
F(GRM155R61A106M) C
L
=10
μ
F(GRM155R61A106M)
L
V
IN
CE
CE
PGND
C
IN
V
OUT
AGND
C
L
V
IN
Lx
V
OUT
1.5A
100
90
Efficiency: EFFI (%)
80
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
10000
Output Current: I
OUT
(mA)
VIN = 5.0V
VIN = 3.7V
VIN = 5.0V
VIN = 3.7V
XC9261
XC9260
1/28
XC9260/XC9261
Series
■
BLOCK DIAGRAM
1)
XC9260/XC9261 Series Type A (SOT-89-5)
2)
XC9260/XC9261 Series Type B (SOT-89-5)
(*) The XC9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.
The XC9261 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM
automatic switching” internally.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
3)
XC9260/XC9261 Series Type A (USP-6C)
4)
XC9260/XC9261 Series Type B (USP-6C)
(*)
The XC9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.
The XC9261 control scheme is a fixed PWM/PFM automatic switching, a Control Logic of PWM/PFM Selector is fixed at “PWM/PFM
automatic switching” internally.
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
2/28
XC9260/XC9261
Series
■PRODUCT
CLASSIFICATION
1) Ordering Information
XC9260①②③④⑤⑥-⑦ PWM Control
XC9261①②③④⑤⑥-⑦ PWM/PFM Automatic switching control
DESIGNATOR
①
ITEM
Type
SYMBOL
A
B
DESCRIPTION
Refer to Selection Guide
Output voltage options
e.g. 1.2V
→ ②=1, ③=2
1.25V
→ ②=1, ③=C
0.05V increments : 0.05=A, 0.15=B, 0.25=C,
0.35=D, 0.45=E, 0.55=F,
0.65=H, 0.75=K, 0.85=L,
0.95=M
1.2MHz
3.0MHz
SOT-89-5 (1,000pcs/Reel)
USP-6C (3,000pcs/Reel)
②③
Output Voltage
08½36
④
(*1)
Oscillation Frequency
Packages (Order Unit)
C
D
PR-G
ER-G
⑤⑥-⑦
(*1)
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.
2) Selection Guide
TYPE
A
B
OUTPUT VOLTAGE
Fixed
Fixed
C
L
AUTO-DISCHARGE
No
Yes
SHORT PROTECTION
(LATCH)
No
Yes
UVLO
Yes
Yes
TYPE
A
B
CHIP ENABLE
Yes
Yes
CURRENT LIMIT
Yes
Yes
SOFT-START TIME
Fixed
Fixed
THERMAL SHUTDOWN
Yes
Yes
3/28
XC9260/XC9261
Series
■PIN
CONFIGURATION
* The dissipation pad for the USP-6C package should be solder-plated in recommended mount pattern and metal masking so
as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected
to the GND (No. 1 and 2) pin.
■PIN
ASSIGNMENT
PIN NUMBER
SOT-89-5
1
2
3
4
5
-
-
USP-6C
5
-
3
4
6
2
1
PIN NAME
Lx
V
SS
V
OUT
CE
V
IN
AGND
PGND
FUNCTIONS
Switching Output
Ground
Output Voltage Monitor
Chip Enable
Power Input
Analog Ground
Power Ground
■FUNCTION
CE PIN Function
PIN NAME
CE
SIGNAL
L
H
STATUS
Stand-by
Active
Please do not leave the CE pin open.
4/28
XC9260/XC9261
Series
■ABSOLUTE
MAXIMUM RATINGS
Ta=25℃
PARAMETER
V
IN
Pin Voltage
Lx PIN Voltage
V
OUT
Pin Voltage
CE Pin Voltage
SOT-89-5
Power Dissipation
USP-6C
Operating Ambient Temperature
Storage Temperature
(*1)
(*2)
(*3)
SYMBOL
V
IN
V
Lx
V
OUT
V
CE
RATINGS
-0.3½+6.2
-0.3½V
IN
+0.3 or +6.2
(*1)
-0.3½V
IN
+0.3 or +4.0
(*2)
-0.3½+6.2
500
1300 (PCB mounted)
(*3)
120
1000 (PCB mounted)
(*3)
-40½+105
-55½+125
UNITS
V
V
V
V
Pd
mW
Topr
Tstg
℃
℃
* All voltages are described based on the GND (AGND and PGND and V
SS
) pin.
The maximum value should be either V
IN
+0.3V or +6.2V in the lowest.
The maximum value should be either V
IN
+0.3V or +4.0V in the lowest.
The power dissipation figure shown is PCB mounted and is for reference only.
Please see the power dissipation page for the mounting condition.
5/28
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