OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

NCP5318FTR2G

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
NCP5318
http://onsemi.com
7
ELECTRICAL CHARACTERISTICS (continued) (0°C < T
A
< 70°C; V
CC
= 12 V; C
GATEx
= 100 pF, C
COMP
= 0.01 mF,
C
SS
= 0.1 mF, C
VCC
= 0.1 mF, R
ROSC
= 95.3 kW, V(I
LIM
) = 1.0 V, DAC Code 010100; unless otherwise noted)
Characteristic UnitMaxTypMinTest Conditions
VID Inputs
SGND Bias Current SGND < 300 mV, All DAC Codes 10 20 40
mA
SGND Voltage Compliance Range − −200 − 300 mV
Power Good
Upper Threshold Offset Offset from the No Load Set Point Voltage 85 97 115 mV
Lower Threshold Ratio PWRLS Voltage / No Load Set Point Volt-
age
0.475 0.505 0.525 V/V
Time to Assert PWRGD Delay from V
OUT
in Range to PWRGD High 1.0 2.0 4.0 ms
Time to De−assert PWRGD Delay from V
OUT
out of Range to PWRGD
Low
0 1.0 4.0
ms
Output Low Voltage Voltage with Open Collector Pin Sinking
4 mA
0 180 400 mV
Overvoltage Protection
OVP Threshold above VID − 170 215 250 mV
Enable Input
Start Threshold Gates switching, SS high − − 0.8 V
Stop Threshold Gates not switching, SS low 0.4 − − V
Hysteresis − 100 170 − mV
Input Pull−Up Voltage
1.0 MW to GND
2.7 2.9 3.3 V
Input Pull−Up Resistance − 7.0 10 20
kW
Error Amplifier
V
FB
Bias Current − − 0.1 1.0
mA
COMP Source Current COMP = 0.5 V to 2.0 V 40 70 100
mA
COMP Sink Current − 40 70 100
mA
Transconductance (Note 2) 1.1 1.3 1.5 mmho
Open Loop DC Gain (Note 2) 72 80 − dB
Unity Gain Bandwidth C
COMP
= 30 pF (Note 2) − 4.0 − MHz
PSRR @ 1.0 kHz (Note 2) − 60 − dB
COMP Max Voltage V
FB
= 0 V 2.4 2.9 − V
COMP Min Voltage V
FB
= 1.6 V − 80 150 mV
PWM Comparators
Minimum Pulse Width Measured from CSxP to GATEx,
V
FB
= CSxN = 0.5, COMP = 0.5 V,
60 mV step between CSxP and CSxN;
Measure at GATEx = 1.0 V (Note 2)
− 40 100 ns
Transient Response Time Measured from CSxN to GATEx,
COMP = 2.1 V, CSxP = CSxN = 0.5 V,
CSxN stepped from 1.2 V to 2.0 V (Note 2)
− 40 60 ns
Channel Startup Offset CSxP = CSxN = V
FB
= 0, Measure Vcomp
when GATEx switch high
0.35 0.62 0.75 V
Artificial Ramp Amplitude 50% duty cycle − 175 − mV
MOSFET Driver Enable (DRVON)
Output High DRVON floating 2.3 − − V
Output Low
I = 100 mA
− − 0.2 V
Pull−Down Resistance DRVON = 1.5 V, ENABLE = 0 V,
R = 1.5 V/I(DRVON)
35 70 140
kW
2. Guaranteed by design, not tested in production.
NCP5318
http://onsemi.com
8
ELECTRICAL CHARACTERISTICS (continued) (0°C < T
A
< 70°C; V
CC
= 12 V; C
GATEx
= 100 pF, C
COMP
= 0.01 mF,
C
SS
= 0.1 mF, C
VCC
= 0.1 mF, R
ROSC
= 95.3 kW, V(I
LIM
) = 1.0 V, DAC Code 010100; unless otherwise noted)
Characteristic UnitMaxTypMinTest Conditions
MOSFET Driver Enable (DRVON)
Source Current DRVON = 1.5 V 0.5 3.0 6.5 mA
GATES
High Voltage Measure GATEx, I
GATEx
= 1.0 mA 2.25 − − V
Low Voltage Measure GATEx, I
GATEx
= 1.0 mA − 0.1 0.7 V
Rise Time GATE 0.8 V < GATEx < 2.0 V, V
CC
= 10 V − 5.0 10 ns
Fall Time GATE 2.0 V > GATEx > 0.8 V, V
CC
= 10 V − 5.0 10 ns
Oscillator
Switching Frequency R
OSC
= 95.3 k, 3 Phase
R
OSC
= 95.3 k, 4 Phase
276
213
325
251
374
289
kHz
R
OSC
Voltage − 0.95 1.02 1.05 V
Phase Delay, 3 Phases V
CC
= CS4P = CS4N 100 120 140 deg
Phase Delay, 4 Phases − 75 90 105 deg
Phase Disable Threshold V
CC
− (CS4P = CS4N) 500 − − mV
Adaptive Voltage Positioning
V
DRP
Output Voltage to DAC
OUT
Offset CSxP = CSxN, V
FB
= COMP,
Measure V
DRP
− COMP
−20 0 +20 mV
Current Sense Amplifier to V
DRP
Gain
(each channel separately)
CSxP − CSxN = 80 mV, V
FB
= COMP, Mea-
sure V
DRP
− COMP for 25°C < T
A
< 70°C
4.37 4.6 4.83 V/V
V
DRP
Source Current − 0.95 1.3 3.0 mA
V
DRP
Sink Current − 0.2 0.4 0.6 mA
Soft−Start
Charge Current − 30 44 50
mA
Discharge Current − 90 120 160
mA
COMP Pull−Down Current − 0.2 0.9 2.1 mA
Current Sensing and Overcurrent Protection
CSxP Input Bias Current CSxN = CSxP = 0 V − 0.1 1.0
mA
CSxN Input Bias Current CSxN = CSxP = 0 V − 0.1 1.0
mA
Current Sense Amp to PWM Gain CSxN = 0 V, CSxP = 80 mV, Measure
V(COMP) when GATEx switches high
3.4 4.6 5.8 V/V
Current Sense Amp to PWM Bandwidth (Note 2) − 7.0 − MHz
Current Sense Amp to I
LIM
Gain CSxP − CSxN = 20 mV to 60 mV, Ramp
I
LIM
until SS goes low
3.228 3.390 3.526 V/V
Current Sense Amp to I
LIM
Bandwidth (Note 2) − 1.0 − MHz
Current Limit Filter Slew Rate (Note 2) 2.0 5.0 13
mV/ms
I
LIM
Input Bias Current I
LIM
= 0 V − 0.1 1.0
mA
Current Sense Amp to I
LIM
Output Offset T = 80°C −82 −12 58 mV
Current Sense Common Mode Input Range (Note 2) 0 − 2.0 V
General Electrical Specifications
V
CC
Operating Current COMP = 0.3 V (no switching) − 27 35 mA
UVLO Start Threshold SS charging, GATEx switching 8.5 9.0 9.5 V
UVLO Stop Threshold GATEx not switching, SS and COMP
discharging
7.5 8.0 8.5 V
UVLO Hysteresis Start − Stop 0.8 1.0 1.2 V
2. Guaranteed by design, not tested in production.
NCP5318
http://onsemi.com
9
PIN DESCRIPTION
Pin No. Pin Symbol Pin Name Description
1−3,
30−32
V
ID0
−V
ID5
DAC VID Inputs VID−compatible logic input used to program the converter output voltage.
All high on V
ID0
−V
ID4
generates fault.
4 PWRLS Power Good Sense Voltage sensing pin for Power Good lower threshold.
5 V
FFB
Fast Voltage Feedback Input of PWM comparator for fast voltage feedback, and also the inputs of
Power Good sense and overvoltage protection comparators
6 SS Soft−Start A capacitor between this pin and ground programs the soft−start time.
7 PWRGD Power Good Output Open collector output goes high when the converter output is in regulation.
8 DRVON Drive ON 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 V
DRP
Output of Current Sense
Amplifiers for Adaptive
Voltage Positioning
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.
11 V
FB
Voltage Feedback Error amplifier inverting input.
12 COMP Error Amp Output Provides loop compensation and is clamped by SS during soft−start and
fault conditions. It is also the inverting input of PWM comparators.
13 CS4N Current Sense Reference Inverting input to current sense amplifier #4.
14 CS4P Current Sense Input Non−inverting input to current sense amplifier #4.
15 CS3N Current Sense Reference Inverting input to current sense amplifier #3, and Phase 3 disable pin.
16 CS3P Current Sense Input Non−inverting input to current sense amplifier #3, and Phase 3 disable pin.
17 GND Ground IC power supply return. Connected to IC substrate.
18−21 GATE4−GATE1 Channel Outputs PWM outputs to drive MOSFET driver ICs.
22 V
CC
IC Power Supply Power Supply Input for IC.
23 R
OSC
Oscillator Frequency Adjust Resistor to ground programs the oscillator frequency.
24 I
LIM
Total Current Limit Resistor divider between R
OSC
and ground programs the over current limit.
25 CS1P Current Sense Input Non−inverting input to current sense amplifier #1.
26 CS1N Current Sense Reference Inverting input to current sense amplifier #1.
27 CS2P Current Sense Input Non−inverting input to current sense amplifier #2.
28 CS2N Current Sense Reference Inverting input to current sense amplifier #2.
29 ENABLE Enable A voltage less than the threshold puts the IC in Fault Mode, discharging SS.
Hysteresis is provided to prevent chatter.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

NCP5318FTR2G

Mfr. #:
Buy NCP5318FTR2G
Manufacturer:
ON Semiconductor
Description:
Switching Controllers 2/3/4 Phase Buck CPU
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet