XD9260/XD9261
Series
ETR05060-001
COT Control, 1.5A Synchronous Step-Down DC/DC Converters
■GENERAL
DESCRIPTION
☆AEC-Q100
Grade2
☆GreenOperation-compatible
The XD9260/XD9261 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 XD9260 series is PWM control, the XD9261
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.
(*)
HiSAT-COT is an original Torex term for High Speed Transient Response.
■APPLICATIONS
●Car
navigation systems
●Car
audios
●Car-mounted
camera
●ETC
/ Other automotive accessories
■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 (XD9260)
PWM/PFM Auto (XD9261)
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℃
USP-6C
EU RoHS Compliant, Pb Free
Protection Circuits
Functions
Capacitor
Operating Ambient Temperature
Packages
Environmentally Friendly
■TYPICAL
APPLICATION CIRCUIT
■TYPICAL
PERFORMANCE
CHARACTERISTICS
XD9260A18D / XD9261A18D
L = LQM2MPN1R0MGH(1.0μH)
C
IN
= 10μF C
L
= 10μF
L
V
IN
CE
CE
PGND
C
IN
V
OUT
AGND
C
L
V
IN
Lx
V
OUT
1.5A
100
90
80
Efficiency: EFFI (%)
70
60
50
40
30
20
10
0
0.1
1
10
100
VIN = 5.0V
VIN = 3.7V
VIN = 5.0V
VIN = 3.7V
XD9261
XD9260
1000
10000
Output Current: I
OUT
(mA)
1/26
XD9260/XD9261
Series
■
BLOCK DIAGRAM
1)
XD9260/XD9261 Series Type A (USP-6C)
(*)
The XD9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.
The XD9261 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)
XD9260/XD9261 Series Type B (USP-6C)
(*)
The XD9260 offers a fixed PWM control, a Control Logic of PWM/PFM Selector is fixed at “PWM” internally.
The XD9261 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.
2/26
XD9260/XD9261
Series
■PRODUCT
CLASSIFICATION
1) Ordering Information
XD9260①②③④⑤⑥-⑦ PWM Control
XD9261①②③④⑤⑥-⑦ 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
USP-6C (1,000pcs/Reel)
②③
Output Voltage
08½36
④
(*1)
Oscillation Frequency
Packages (Order Unit)
C
D
ER-Q
⑤⑥-⑦
(*1)
The “-Q” suffix denotes “AEC-Q100” and “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
3/26
XD9260/XD9261
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
USP-6C
1
2
3
4
5
6
PIN NAME
PGND
AGND
V
OUT
CE
Lx
V
IN
FUNCTIONS
Power Ground
Analog Ground
Output Voltage Monitor
Chip Enable
Switching Output
Power Input
■FUNCTION
CE PIN Function
PIN NAME
CE
SIGNAL
L
H
STATUS
Stand-by
Active
Please do not leave the CE pin open.
4/26
XD9260/XD9261
Series
■ABSOLUTE
MAXIMUM RATINGS
Ta=25℃
PARAMETER
Input Voltage
Lx PIN Voltage
Output Voltage
CE Input Voltage
Lx Current
Power Dissipation
USP-6C
Operating Ambient Temperature
Storage Temperature
(*1)
(*2)
SYMBOL
V
IN
V
Lx
V
OUT
V
CE
I
Lx
Pd
Topr
Tstg
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
-
1000 (PCB mounted)
-40½+105
-55½+125
UNITS
V
V
V
V
mA
mW
℃
℃
* 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.
5/26
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