NCP1595C PWM Converter Datasheet

NCP1595C Datasheet, PDF, Equivalent


Part Number

NCP1595C

Description

Current Mode PWM Converter

Manufacture

ON Semiconductor

Total Page 13 Pages
Datasheet
Download NCP1595C Datasheet


NCP1595C
NCP1595, NCP1595A,
NCP1595C
Buck Regulator-
Synchronous
1 MHz, 1.5 A
The NCP1595/A/C family are fixed 1 MHz, highoutputcurrent,
synchronous PWM converters that integrate a lowresistance,
highside Pchannel MOSFET and a lowside Nchannel MOSFET.
The NCP1595/A/C utilizes current mode control to provide fast
transient response and excellent loop stability. It regulates input
voltages from 4.0 V to 5.5 V down to an output voltage as low as 0.8 V
and is able to supply up to 1.5 A.
The NCP1595/A/C includes an internally fixed switching frequency
(FSW), and an internal softstart to limit inrush currents. Using the EN
pin, shutdown supply current is reduced to 3 mA maximum.
Other features include cyclebycycle current limiting,
shortcircuit protection and thermal shutdown.
Features
Input Voltage Range: from 4.0 V to 5.5 V
Internal 140 mW HighSide Switching PChannel MOSFET and
90 mW LowSide NChannel MOSFET
Fixed 1 MHz Switching Frequency
CyclebyCycle Current Limiting
Overtemperature Protection
Internal SoftStart
Diode Emulation During Light Load (Disabled for NCP1595C)
Hiccup Mode ShortCircuit Protection
Startup with PreBiased Output Load
Adjustable Output Voltage Down to 0.8 V
These are PbFree Devices
Applications
DSP Power
Hard Disk Drivers
Computer Peripherals
Home Audio
SetTop Boxes
Networking Equipment
LCD TV
Wireless and DSL/Cable Modem
USB Power Devices
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MARKING
DIAGRAM
1
DFN6
CASE 506AH
XXXXX
ALYWG
G
XXXXX = N1595, 1595A, 1595C
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = PbFree Package
(Note: Microdot may be in either location)
PIN CONNECTIONS
FB 1
6 NC
GND 2
5 VCC
LX 3
4 VCCP
NCP1595/NCP1595C
FB 1
6 EN
GND 2
5 VCC
LX 3
4 VCCP
NCP1595A
ORDERING INFORMATION
Device
Package
Shipping
NCP1595MNR2G
NCP1595MNT2G
NCP1595AMNR2G
DFN6
(PbFree)
3000 / Tape & Reel
NCP1595AMNTWG
NCP1595CMNTWG
†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
August, 2019 Rev. 11
1
Publication Order Number:
NCP1595/D

NCP1595C
NCP1595, NCP1595A, NCP1595C
BLOCK DIAGRAM
NCP1595/A/C
VCC
NC/EN
Power Reset
UVLO
THD
Hiccup
SoftStart
Vref
FB
+
+ gm
+
CA
+ OSC
PMOS
M1
PWM
+
Control
Logic
VCCP
LX
GND
PIN DESCRIPTIONS
Pin No
Symbol
1 FB
2 GND
3 LX
4 VCCP
5 VCC
6 NC
EN
EP PAD
Figure 1. Block Diagram
Description
Feedback input pin of the Error Amplifier. Connect a resistor divider from the converter’s output volt-
age to this pin to set the converter’s output voltage.
Ground pin. Connect to thermal pad.
The drains of the internal MOSFETs. The output inductor should be connected to this pin.
Power input for the power stage
Input supply pin for internal bias circuitry. A 0.1 mF ceramic bypass capacitor is preferred to connect
to this pin.
No connection for NCP1595 or NCP1595C
Logic input to enable the part. Logic high to turn on the part and logic low to shut off the part.
An internal pullup forces the part into an enable state when no external bias is present on the pin.
For NCP1595A only
Exposed pad of the package provides both electrical contact to the ground and good thermal contact
to the PCB. This pad must be soldered to the PCB for proper operation.
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2


Features NCP1595, NCP1595A, NCP1595C Buck Regula tor- Synchronous 1 MHz, 1.5 A The NCP15 95/A/C family are fixed 1 MHz, high−o utput−current, synchronous PWM conver ters that integrate a low−resistance, high−side P−channel MOSFET and a l ow−side N−channel MOSFET. The NCP15 95/A/C utilizes current mode control to provide fast transient response and ex cellent loop stability. It regulates in put voltages from 4.0 V to 5.5 V down t o an output voltage as low as 0.8 V and is able to supply up to 1.5 A. The NCP 1595/A/C includes an internally fixed s witching frequency (FSW), and an intern al soft−start to limit inrush current s. Using the EN pin, shutdown supply cu rrent is reduced to 3 mA maximum. Other features include cycle−by−cycle cu rrent limiting, short−circuit protect ion and thermal shutdown. Features • Input Voltage Range: from 4.0 V to 5.5 V • Internal 140 mW High−Side Switc hing P−Channel MOSFET and 90 mW Low Side N−Channel MOSFET • Fixed 1 MHz Switching Frequency • Cycle−by−Cycle Current Limiting • Ov.
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