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NCP3134 Datasheet

4A Integrated Synchronous Buck Converter

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NCP3134
4 A Integrated Synchronous
Buck Converter
NCP3134 is a fully integrated synchronous buck converter for 3.3 V
and 5 V step−down applications. It can provide up to 4 A load current.
NCP3134 supports high efficiency, fast transient response and
provides power good indicator. The control scheme includes two
operation modes: FCCM and automatic CCM/DCM. In automatic
CCM/DCM mode, the controller can smoothly switch between CCM
and DCM, where converter runs at reduced switching frequency with
much higher efficiency. NCP3134 is available in 3 mm x 3 mm
QFN16 pin package.
Features
High Efficiency in both CCM and DCM
High Operation Frequency at 2.2 MHz
Support MLCC Output Capacitor
Small Footprint, 3 mm x 3 mm, 16−pin QFN Package
Up to 4 A Continuous Output Current
2.9 V to 5.5 V Wide Conversion Voltage Range
Output Voltage Range from 12% Vin to 80% Vin
Internal 1.0 ms Soft−Start
User Selection Between Automatic Power−Saving Mode and FCCM
Operations
Voltage Mode Control
Support Pre-bias Start−up Functionality
Output Discharge Operation
Over−Temperature Protection
Built−in Over−Voltage, Under−Voltage and Over-Current Protection
Power Good Indicator
This Device is Pb−Free and is RoHS Compliant
Applications
5 V Step Down Rail
3.3 V Step Down Rail
www.onsemi.com
1
QFN16 3 x 3, 0.5P
CASE 485DA
SUGGESTED PIN ARRANGEMENT
PGND PGND VIN VIN
16 15 14 13
EN 1
12 VDD
NC 2
PGD 3
NCP3134
11 AGND
10 FB
VBST 4
9 COMP
5678
SW SW SW PS
MARKING DIAGRAM
3134
ALYWG
G
3134
A
L
Y
W
G
= Specific Device Code
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering, marking and shipping information in the
package dimensions section on page 12 of this data sheet.
© Semiconductor Components Industries, LLC, 2016
August, 2016 − Rev. 1
1
Publication Order Number:
NCP3134/D


  ON Semiconductor Electronic Components Datasheet  

NCP3134 Datasheet

4A Integrated Synchronous Buck Converter

No Preview Available !

NC OSC
PS
EN
COMP
Ramp
SS
VREF
FB
+
+ E/A
PGD
NCP3134
VIN
UVLO
Control Logic
&
PWM Logic
DRVH
Power Good,
UVP, OVP, UVLO,
Overtemperature
and Vout discharge
DRVL
OCP
UVLO
VBST
SW
PGND
VDD
AGND
Figure 1. Block Diagram
Table 1. PIN DESCRIPTION
Pin No.
Symbol
Description
1 EN Logic control to enabling the switcher. Internally pulled up to VDD with a 1.35 MW resistor
2 NC Not connected
3
PGD
Open drain power good output
4
VBST
Gate drive voltage for high side FET. Connect capacitor from this pin to SW
5, 6, 7
SW Switch node between high−side MOSFET and low−side MOSFET
8 PS Mode configuration pin (with 10 mA current):
Pulled high or floating (internally pulled high): Forced Continuous Conduction Mode
Connect with resistor equal to or lower than ()174 kW to GND: Automatic CCM/DCM
9 COMP Output of the error amplifier
10 FB Feedback pin. Connect to resistor divider to set up the desired output voltage
11
AGND
Analog ground
12
VDD
Power supply input for control circuitry
13, 14
VIN Power input for power conversion and gate driver supply
15, 16
PGND
Power ground
www.onsemi.com
2


Part Number NCP3134
Description 4A Integrated Synchronous Buck Converter
Maker ON Semiconductor
Total Page 13 Pages
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