参数资料
| 型号： | NCP5314MNR2 |
| 厂商： | ON Semiconductor |
| 文件页数： | 8/29页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR BUCK CPU 2/3/4PH 32QFN |
| 产品变化通告： | Product Discontinuation 30/Jun/2004 |
| 标准包装： | 1 |
| 应用： | 控制器，CPU |
| 输入电压： | 9.5 V ~ 13.2 V |
| 输出数： | 4 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（5x5） |
| 包装： | 剪切带 (CT) |
| 其它名称： | NCP5314MNR2OSCT |
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NCP5314
PIN DESCRIPTION
Pin No.
1?3,
30?32
4
5
Pin Symbol
V ID0 ?V ID5
PWRLS
V FFB
Pin Name
DAC VID Inputs
Power Good Sense
Fast Voltage Feedback
Description
VID?compatible logic input used to program the converter output voltage.
All high on V ID0 ?V ID4 generates fault.
Voltage sensing pin for Power Good lower threshold.
Input of PWM comparator for fast voltage feedback, and also the inputs of
Power Good sense and overvoltage protection comparators
6
7
8
SS
PWRGD
DRVON
Soft Start
Power Good Output
Drive Enable
A capacitor between this pin and ground programs the soft start time.
Open collector output goes high when the converter output is in regulation.
Logic high enables MOSFET drivers, and logic low turns all MOSFETs off
through MOSFET drivers. Pulled to ground through internal 70 k resistor.
9
SGND
Remote Sense Ground
Ground connection for DAC and error amplifier. Provides remote sensing of
load ground.
10
11
12
V DRP
V FB
COMP
Output of Current Sense
Amplifiers for Adaptive
Voltage Positioning
Voltage Feedback
Error Amp Output
The offset above DAC voltage is proportional to the sum of inductor current.
A resistor from this pin to V FB programs the amount of Adaptive Voltage
Positioning. Leave this pin open for no Adaptive Voltage Positioning.
Error amplifier inverting input.
Provides loop compensation and is clamped by SS during soft start and
fault conditions. It is also the inverting input of PWM comparators.
13
14
15
16
17
18?21
22
23
CS4N
CS4P
CS3N
CS3P
GND
GATE4?GATE1
V CC
R OSC
Current Sense Reference
Current Sense Input
Current Sense Reference
Current Sense Input
Ground
Channel Outputs
IC Power Supply
Oscillator Frequency Adjust
Inverting input to current sense amplifier #4.
Non?inverting input to current sense amplifier #4.
Inverting input to current sense amplifier #3, and Phase 3 disable pin.
Non?inverting input to current sense amplifier #3, and Phase 3 disable pin.
IC power supply return. Connected to IC substrate.
PWM outputs to drive MOSFET driver ICs.
Power Supply Input for IC.
Resistor to ground programs the oscillator frequency, as shown in Oscillator
Frequency graph Figure 7.
24
I LIM
Total Current Limit
Resistor divider between R OSC and ground programs the average current
limit.
25
26
27
28
29
CS1P
CS1N
CS2P
CS2N
ENABLE
Current Sense Input
Current Sense Reference
Current Sense Input
Current Sense Reference
Enable
Non?inverting input to current sense amplifier #1.
Inverting input to current sense amplifier #1.
Non?inverting input to current sense amplifier #2.
Inverting input to current sense amplifier #2.
A voltage less than the threshold puts the IC in Fault Mode, discharging SS.
Connect to system VID PWRGD signal to control powerup sequencing.
Hysteresis is provided to prevent chatter.
http://onsemi.com
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