Step-Down Controller. NCP5217A Datasheet

NCP5217A Controller. Datasheet pdf. Equivalent

Part NCP5217A
Description Single Synchronous Step-Down Controller
Feature NCP5217A Single Synchronous Step-Down Controller The NCP5217A is a synchronous step−down controller.
Manufacture ON Semiconductor
Datasheet
Download NCP5217A Datasheet




NCP5217A
NCP5217A
Single Synchronous
Step-Down Controller
The NCP5217A is a synchronous stepdown controller for high
performance systems batterypower systems. The NCP5217A
includes a high efficiency PWM controller. A pin is provided to enable
or disable forced PWM mode of operation. An internal power good
voltage monitor tracks the SMPS output. NCP5217A also features
softstart sequence, UVLO for VCC and switcher, overvoltage
protection, overcurrent protection, undervoltage protection and
thermal shutdown. The IC is packaged in QFN14.
Features
0.8% accuracy 0.8 V Reference
4.5 V to 27 V Battery/Adaptor Voltage Range
Adjustable Output Voltage Range: 0.8 V to 3.3 V
Selectable Power Saving Mode / Force PWM Mode
Lossless Inductor Current Sensing
Programmable TransientResponseEnhancement (TRE) Control
Programmable Adaptive Voltage Positioning (AVP)
Input Supply Feedforward Control
Internal SoftStart
Integrated Output Discharge (SoftStop)
Buildin Adaptive Gate Drivers
PGOOD Indication
Overvoltage, Undervoltage and Overcurrent Protections
Thermal Shutdown
QFN14 Package
These Devices are PbFree and are RoHS Compliant
Typical Applications
Notebook Application
System Power
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MARKING
DIAGRAM
QFN14
CASE 485AL
N5217
ALYWG
G
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Package
(Note: Microdot may be in either location)
EN_SKIP
1
BST
14
CS+ 2
CS/Vo 3
COMP 4
FB 5
PGOOD 6
13 DH
12 SWN
11 IDRP/OCP
10 VCC
9 DL/TRESET
7
AGND
8
PGND
QFN14
(Top View)
ORDERING INFORMATION
Device
Package
Shipping
NCP5217AMNTXG QFN14
(PbFree)
3000 /
Tape & 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, 2011
May, 2011 Rev. 2
1
Publication Order Number:
NCP5217A/D



NCP5217A
EN_SKIP 1
Level
Control
ENABLE
FPWM
SKIP
CS+ 2
CS/Vo 3
+ CDIFF
Current Sense
Amplifier
DISCH
COMP 4
FB 5
VREF +
Error Amplifier
PGOOD 6
PGOOD
NCP5217A
IDRP/OCP
Detection
Over Current
Detector
AVP
Control
Thermal Shutdown
VREF+10%
VREF10%
VREF20%
VREF+15%
+ PGH
+ PGL
+ UVP
+ OVP
OC & TRE Detection
NCP5217A
Control Logic,
Protection,
RAMP
Generator and
PWM Logic
14 BST
13 DH
12 SWN
OSC
11 IDRP/OCP
UVLO
Control
VCC
10 VCC
9 DL/TRESET
AGND 7
8 PGND
+5V
EN_SKIP
PGOOD
Figure 1. Block Diagram
QFN14
1
EN_SKIP
2 CS+
14
BST
DH 13
3 CS/Vo
SWN 12
4 COMP
IDRP/OCP 11
5 FB
VCC 10
6 PGOOD
AGND
7
DL/TRESET 9
PGND
8
VIN
VOUT
PGND
Figure 2. Typical Application Circuit
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2







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