XC6372B350PL [TOREX]
Switching Regulator/Controller;
| 型号： | XC6372B350PL |
| 厂家： | 
Torex Semiconductor |
| 描述： | Switching Regulator/Controller |
| 文件： | 总2页 (文件大小：98K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
4. DC/DC Converters __________________________________________________________________________________
XC6372 SeriesꢀDual Mode [PWM/PFM] Step-up DC/DC Converters
DETAILS
General Description
Features
The XC6372 series, unlike the conventional PWM controlled
converters, are a group of step-up DC/DC converters that
automatically change their operation modes into PFM modes
while loads are light, such as when the duty ratios are less
than 10%.
Operating (start-up) voltage range: 0.9V ~ 10V
Output voltage range: 2.0V ~ 7.0V in 0.1V increments
Highly accurate: Set-up voltage ±2.5%
Oscillator frequency: 50kHz, 100kHz, 180kHz (±15%) selectable
Maximum output currents (Tr built-in):
When loads are light, as in the stand-by mode, the XC6372
changes to PFM control so as to decrease oscillator frequen-
cies, resulting in reduced supply current.
Typ. 100mA at VIN=3.0,VOUT=5.0V……….Note(1)
Built-in switching transistor type and an external Tr type available.
Five-lead packaged units offer either Chip Enable or independent Vout pin
option.
Therefore, the XC6372 is suitable for use with portable
equipment that requires the PWM controlled performance of
low ripple and high output proprietary phase compensation
and slow start-up circuits ensure excellent transient response
and improved performance.
Phase compensation and slow startup circuits included.
Small package: SOT-89 mini-power mold (3-pin, 5-pin)
Note(1) : Performance depends on external components and PCB layout.
Output voltage can be selected from 2.0V to 7.0V in 0.1V in-
crements (accuracy: ±2.5%). Oscillator frequency is also se-
lectable from three frequencies; 50, 100, and 180kHz (accu-
racy: ±15%).
Every built-in switching transistor type enables a step-up cir-
cuit to be configured using only three external components; a
coil, a diode, and a capacitor. External transistor versions are
available to accommodate high output current applications.
SOT-89 small package.
Pin Configuration
Pin Assignment
(1) XC6372A, XC6372B
5
4
PIN NUMBER
XC6372A XC6372B
PIN
FUNCTION
NAME
SOT-89
SOT-89-5
(TOP VIEW)
1
1
VSS
Ground
(TOP VIEW)
Output voltage monitor /
IC internal power supply
Switch
2
2
VOUT
3
-
-
3
LX
EXT
1
2
3
1
2
3
External switch transistor drive
Pin Assignment
(2) XC6372C, XC6372D
PIN NUMBER
(3) XC6372E, XC6372F
PIN NUMBER
PIN
PIN
FUNCTION
FUNCTION
NAME
VSS
NAME
XC6372C
5
XC6372D
5
XC6372E
XC6372F
Ground
Output voltage monitor /
IC internal power supply
Switch
5
2
4
-
5
2
-
4
3
1
VSS
VDD
LX
EXT
VOUT
NC
Ground
IC internal power supply
Switch
External switch transistor drive
Output voltage monitor
No Connection
2
2
VOUT
4
-
3
1
-
LX
EXT
CE
4
3
1
External switch transistor drive
Chip Enable
3
1
NC
No Connection
Block Diagram
(1) XC6372A ~ XC6372D
(2) XC6372E and XC6372F
(The VOUT pin serves also as VDD .)
VDD
LX
LX
VDD
・
VLX limiter
Slow Start
Vref
・
VLX limiter
Slow Start
Vref
・
Buffer
・
Buffer
VDD
VOUT
・
VOUT
・
PWM comp
PWM comp
PWM / PFM Control
OSC 50/100/180KHz
PWM / PFM Control
OSC 50/100/180KHz
VSS
EXT
VSS
EXT
・
・
・
・
・
+
-
+
-
・
Chip Enable
CE
Note : Built-in tr.type units use the LX pin. External tr.type units use the EXT pin.
The CE pin is only used with the XC6372C and XC6372D.
Note：The VDD pin is only used wiXth XC6372E and XC6372F.
Buiot-in tr.type units use the L pin. External tr.type units use the EXT pin.
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●
Selection Guide
START
3-pin
Built-inTransistor
ExternalTransistor
XC6372A
XC6372B
Chip Enable
Built-inTransistor
ExternalTransistor
XC6372C
XC6372D
Separated "VDD" and "VOUT" leads
Built-inTransistor
ExternalTransistor
XC6372E
XC6372F
Ordering Information
XC6372①②③④⑤⑥
XC6372series PWM/PFM switching control
A
B
C
D
E
F
3-pin, Built-in switching transistor
3-pin, External switching transistor
Stand-by capability, Built-in switching transistor
Stand-by capability, External switching transistor
Separated VDD and VOUT, Built-in switching transistor
Separated VDD and VOUT, External switching transistor
Output Voltage
①
②
③
e.g.,VOUT=3.5V → ②=3, ③=5
0
1
2
OSC Frequency 50kHz
④
OSC Frequency 100kHz
OSC Frequency 180kHz
Package A ~ B → SOT-89-3
⑤
⑥
P
C ~ F → SOT-89-5
R
L
Embossed tape. Orientation of device : Right
Embossed tape. Orientation of device : Left
35
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