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  ON Semiconductor Electronic Components Datasheet  

NCP81253 Datasheet

5V MOSFET Driver Compatible

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NCP81253 pdf
NCP81253
5 V MOSFET Driver
Compatible with
Single-Phase IMVP8
Controllers
The NCP81253 is a high performance dual MOSFET gate driver in
a small 2 mm x 2 mm package, optimized to drive the gates of both
high−side and low−side power MOSFETs in a synchronous buck
converter. The driver outputs can be placed into a high−impedance
state via the tri−state PWM and EN inputs. The NCP81253 comes
packaged with an integrated boost diode to minimize external
components. A VCC UVLO function guarantees the outputs are low
when the supply voltage is low.
Features
Space−efficient 2 mm x 2 mm DFN8 Thermally−enhanced Package
VCC Range of 4.5 V to 5.5 V
Internal Bootstrap Diode
5 V 3−stage PWM Input
Diode Braking Capability via EN Mid−state
Adaptive Anti−cross Conduction Circuit Protects against
Cross−conduction during FET Turn−on and Turn−off
Output Disable Control Turns Off both MOSFETs via Enable Pin
VCC Undervoltage Lockout
These devices are Pb−free, Halogen−free/BFR−free and are RoHS
compliant
Typical Applications
Power Solutions for Notebook and Desktop Systems
www.onsemi.com
1
DFN8
CASE 506AA
MARKING
DIAGRAM
1
CGMG
G
CG = Specific Device Code
M = Date Code
G = Pb−Free Package
(Note: Microdot may be in either location)
PINOUT DIAGRAM
BST 1
PWM 2
EN 3
VCC 4
8 DRVH
FLAG
9
7 SW
6 GND
5 DRVL
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP81253MNTBG DFN8
3000 / Tape &
(Pb−Free)
Reel
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
© Semiconductor Components Industries, LLC, 2014
December, 2014 − Rev. 0
1
Publication Order Number:
NCP81253/D


  ON Semiconductor Electronic Components Datasheet  

NCP81253 Datasheet

5V MOSFET Driver Compatible

No Preview Available !

NCP81253 pdf
VCC
PWM
EN
NCP81253
BST
Logic
Anti−Cross
Conduction
VCC
UVLO
VCC
DRVH
SW
DRVL
GND
Figure 1. Block Diagram
Table 1. PIN FUNCTION DESCRIPTION
Pin No.
Pin Name
Description
1 BST Floating bootstrap supply pin for the high−side gate driver. Connect the external bootstrap
capacitor between this pin and SW.
2
PWM
Control input:
PWM = High ³ DRVH is high, DRVL is low.
PWM = Mid ³ DRVH and DRVL are low.
PWM = Low ³ DRVH is low, DRVL is high.
3 EN 3−state input:
EN = High ³ Driver is enabled; normal PWM operation.
EN = Mid ³ Driver is enabled; DRVH and DRVL are low (body diode braking).
EN = Low ³ Driver is disabled.
4
VCC
Power supply input. Connect a bypass capacitor from this pin to ground.
5
DRVL
Low−side gate drive output. Connect to the gate of the low−side MOSFET.
6
GND
Bias and reference ground. All signals are referenced to this node.
7 SW Switch node. Connect this pin to the source of the high−side MOSFET and drain of the
low−side MOSFET.
8
DRVH
High−side gate drive output. Connect to the gate of the high−side MOSFET.
9
FLAG
Thermal flag. There is no electrical connection to the IC. Connect to the ground plane.
www.onsemi.com
2


Part Number NCP81253
Description 5V MOSFET Driver Compatible
Maker ON Semiconductor
Total Page 10 Pages
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