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| 型号： | NCP1580DR2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 3/12页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM VM 8-SOIC |
| 产品变化通告： | Product Discontinuation 01/Oct/2008 |
| 标准包装： | 2,500 |
| PWM 型： | 电压模式 |
| 输出数： | 1 |
| 频率 - 最大： | 412kHz |
| 占空比： | 95% |
| 电源电压： | 4.5 V ~ 13.2 V |
| 降压： | 是 |
| 升压： | 无 |
| 回扫： | 无 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
NCP1580
PIN FUNCTION DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
Symbol
BST
TG
GND
BG
V CC
FB
COMP
PHASE
Description
Supply rail for the floating top gate driver. To form a boost circuit, use an external diode to bring the
desired input voltage to this pin (cathode connected to BST pin). Connect a capacitor (C BST ) between this
pin and the PHASE pin. Typical values for C BST range from 0.1 m F to 1 m F. Ensure that C BST is placed
near the IC.
Top gate MOSFET driver pin. Connect this pin to the gate of the top N?Channel MOSFET.
IC ground reference. All control circuits are referenced to this pin.
Bottom gate MOSFET driver pin. Connect this pin to the gate of the bottom N?Channel MOSFET.
Supply rail for the internal circuitry. Operating supply range is 4.5 V to 13.2 V. Decouple with a 1 m F
capacitor to GND. Ensure that this decoupling capacitor is placed near the IC.
This pin is the inverting input to the error amplifier. Use this pin in conjunction with the COMP pin to
compensate the voltage?control feedback loop. Connect this pin to the output resistor divider (if used) or
directly to Vout.
Compensation Pin. This is the output of the error amplifier (EA) and the non?inverting input of the PWM
comparator. Use this pin in conjunction with the FB pin to compensate the voltage?control feedback loop.
This pin should not be shorted to ground to disable switching.
Switch node pin. This is the reference for the floating top gate driver. Connect this pin to the source of the
top MOSFET. A Schottky diode between this pin and ground is recommended to reduce negative transient
voltages which is common in a power supply system.
ABSOLUTE MAXIMUM RATINGS
Main Supply Voltage Input
Bootstrap Supply Voltage Input
Pin Name
Symbol
V CC
BST
V MAX
15 V
30 V wrt/GND
V MIN
?0.3 V
?0.3 V
15 V wrt/PHASE
Switching Node (Bootstrap Supply Return)
PHASE
30 V
?0.7 V, t > 50 ns
?2.0 V, t < 50 ns
High?Side Driver Output (Top Gate)
Low?Side Driver Output (Bottom Gate)
Feedback
COMP
TG
BG
FB
COMP
30 V wrt/GND
15 V wrt/PHASE
15 V
5.5 V
5.5 V
?0.3 V
wrt/PHASE
?0.3 V
?0.3 V
?0.3 V
MAXIMUM RATINGS
Rating
Thermal Resistance, Junction?to?Case
Operating Junction Temperature Range
Operating Ambient Temperature Range
Storage Temperature Range
ESD Susceptibility
Moisture Sensitivity Level
Human Body Model
Charge Device Model
Symbol
R q JC
T J
T A
T stg
MSL
Value
45
?40 to 150
?40 to 85
?55 to +150
2.0
200
1
Unit
° C/W
° C
° C
° C
kV
V
?
Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
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