NCP5423 Datasheet PDF - ON Semiconductor
| Part Number | NCP5423 | |
| Description | (NCP5422A / NCP5423) Dual Out-of-Phase Synchronous Buck Controller | |
| Manufacturers | ON Semiconductor | |
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NCP5422A, NCP5423
Dual Out−of−Phase
Synchronous
Buck Controller
with Current Limit
The NCP5422A/3 is a dual N−channel synchronous buck regulator
controller. It contains all the circuitry required for two independent
buck regulators and utilizes the V2t control method to achieve the
fastest possible transient response and best overall regulation, while
using the least number of external components. The NCP5422A/3
features out−of−phase synchronization between the channels,
reducing the input filter requirement. The NCP5422A/3 also provides
undervoltage lockout, Soft−Start, built in adaptive non−overlap time
and hiccup mode overcurrent protection.
Features
• V2 Control Topology
• Hiccup Mode Overcurrent Protection
• 150 ns Transient Response
• Programmable Soft−Start
• 100% Duty Cycle for Enhanced Transient Response
• 150 kHz to 600 kHz Programmable Frequency Operation
• Switching Frequency Set by Single Resistor
www.DataSheet4U.com
• Out−Of−Phase Synchronization Between Channels
• Undervoltage Lockout
• Both Gate Drive Outputs Held Low During Fault Condition
• Pb−Free Packages are Available
http://onsemi.com
16
1
SO−16
AD SUFFIX
CASE 751B
MARKING DIAGRAMS AND
PIN CONNECTIONS
1
GATE(H)1
GATE(L)1
GND
BST
IS+1
IS−1
VFB1
COMP1
16
GATE(H)2
GATE(L)2
VCC
ROSC
IS+2
IS−2
VFB2
COMP2
A = Assembly Location
WL = Wafer Lot
Y = Year
WW = Work Week
G = Pb−Free Package
ORDERING INFORMATION
Device
Package
Shipping†
NCP5422ADR2
SO−16 2500 Tape & Reel
NCP5422ADR2G SO−16 2500 Tape & Reel
(Pb−Free)
NCP5423DR2G
SO−16 2500 Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2006
April, 2006 − Rev. 7
1
Publication Order Number:
NCP5422A/D
|
| |
 
NCP5422A, NCP5423
ELECTRICAL CHARACTERISTICS (0°C < TA < 70°C; 0°C < TJ < 125°C; ROSC = 30.9 k, CCOMP1,2 = 0.1 mF,
10.8 V < VCC < 13.2 V; 10.8 V < BST < 20 V, CGATE(H)1,2 = CGATE(L)1,2 = 1.0 nF, unless otherwise specified.)
Characteristic
Test Conditions
Min Typ
Supply Currents
VCC Current
BST Current
COMP1,2 = 0 V (No Switching)
COMP1,2 = 0 V (No Switching)
− 13
− 3.5
Undervoltage Lockout
Start Threshold
GATE(H) Switching; COMP1,2 charging
7.8 8.6
Stop Threshold
GATE(H) not switching; COMP1,2 discharging
7.0
7.8
Hysteresis
Start−Stop
0.5 0.8
Hiccup Mode Overcurrent Protection
OVC Comparator Offset Voltage
0 V < IS+ 1(2) < 5.5 V, 0 V < IS− 1(2) < 5.5 V
55
70
Discharge Threshold
− 0.20 0.25
IS+ 1(2) Bias Current
0 V < IS+ 1(2) < 5.5 V
−1.0 0.1
IS− 1(2) Bias Current
0 V < IS− 1(2) < 5.5 V
−1.0 0.1
OVC Common Mode Range
Note 3
0−
OVC Latch COMP1 Discharge Current COMP1 = 1.0 V
2.0 5.0
OVC Latch COMP2 Discharge Current COMP2 = 1.0 V
0.3 1.2
COMP1 Charge/Discharge Ratio in OVC
−
5.0 6.0
3. Guaranteed by design, not 100% tested in production.
Max
17
6.0
9.4
8.6
1.5
85
0.30
1.0
1.0
5.5
8.0
3.5
7.0
Unit
mA
mA
V
V
V
mV
V
mA
mA
V
mA
mA
−
PACKAGE PIN DESCRIPTION
PIN NO.
PIN SYMBOL
FUNCTION
1
GATE(H)1
High Side Switch FET driver pin for channel 1.
2
GATE(L)1
Low Side Synchronous FET driver pin for channel 1.
3
GND
Ground pin for all circuitry contained in the IC. This pin is internally bonded to the substrate of the IC.
4 BST Power input for GATE(H)1 and GATE(H)2 pins.
5
IS+1
Positive input for channel 1 overcurrent comparator.
6
IS−1
Negative input for channel 1 overcurrent comparator.
7
VFB1
Error amplifier inverting input for channel 1.
8
COMP1
Channel 1 Error Amp output. PWM Comparator reference input. A capacitor to LGND provides Error
Amp compensation. The same capacitor provides Soft−Start timing for channel 1. This pin also
disables the channel 1 output when pulled below 0.3 V.
9
COMP2
Channel 2 Error Amp output. PWM Comparator reference input. A capacitor to LGND provides Error
Amp compensation and Soft−Start timing for channel 2. Channel 2 output is disabled when this pin is
pulled below 0.3 V.
10
VFB2
Error amplifier inverting input for channel 2.
11
IS−2
Negative input for channel 2 overcurrent comparator.
12
IS+2
Positive input for channel 2 overcurrent comparator.
13
ROSC
Oscillator frequency pin. A resistor from this pin to ground sets the oscillator frequency.
14 VCC Input Power supply pin.
15
GATE(L)2
Low Side Synchronous FET driver pin for channel 2.
16
GATE(H)2
High Side Switch FET driver pin for channel 2.
http://onsemi.com
5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for NCP5423 electronic component. |
| Information | Total 16 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ NCP5423.PDF Datasheet ] | |
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