NCP1599 PDF даташит
Спецификация NCP1599 изготовлена «ON Semiconductor» и имеет функцию, называемую «3 A Synchronous Buck Regulator». |
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Детали детали
Номер произв | NCP1599 |
Описание | 3 A Synchronous Buck Regulator |
Производители | ON Semiconductor |
логотип |
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NCP1599
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1 MHz, 3 A Synchronous
Buck Regulator
The NCP1599 is a fixed 1 MHz, high−output−current, synchronous
PWM converter that integrates a low−resistance, high−side P−channel
MOSFET and a low−side N−channel MOSFET. The NCP1599 utilizes
internally compensated current mode control to provide good transient
response, ease of implementation, and excellent loop stability. It
regulates input voltages from 2.8 V to 5.5 V down to an output voltage
as low as 0.8 V and is able to supply up to 3.0 A of load current.
The NCP1599 includes an internally fixed switching frequency
(FSW), and an internal soft−start to limit inrush current.
Other features include cycle−by−cycle current limiting,
short−circuit protection, power saving mode and thermal shutdown.
Features
• Wide Input Voltage Range: from 2.8 V to 5.5 V
• Internal 140 mW High−Side P−Channel and 90 mW Low−Side
N−Channel MOSFET
• Fixed 1 MHz Switching Frequency
• Cycle−by−Cycle Current Limiting
• Hiccup Mode Short−Circuit Protection
• Overtemperature Protection
• Internal Soft−Start
• Start−up with Pre−Biased Output Load
• Adjustable Output Voltage Down to 0.8 V
• Power Saving Mode During Light Load
• These are Pb−Free Devices
Applications
• DSP Power
• Hard Disk Drivers
• Computer Peripherals
• Home Audio
• Set−Top Boxes
• Networking Equipment
• LCD TV
• Wireless and DSL/Cable Modem
• USB Power Devices
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DFN6
CASE 506AH
MARKING
DIAGRAM
1 1599
AYWW
G
A = Assembly Location
Y = Year
WW = Work Week
G = Pb−Free Package
PIN CONNECTIONS
FB 1
6 COMP
GND 2
5 VCC
LX 3
4 VCCP
(Top View)
ORDERING INFORMATION
Device
Package
Shipping†
NCP1599MNR2G DFN6 3000 / 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 Specifications
Brochure, BRD8011/D.
This document contains information on a product under development. ON Semiconductor
reserves the right to change or discontinue this product without notice.
© Semiconductor Components Industries, LLC, 2010
May, 2010 − Rev. P0
1
Publication Order Number:
NCP1599/D
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NCP1599
VCC
COMP
Power Reset
UVLO
THD
Hiccup
Soft−Start
Vref
FB
+
+ gm
−
NCP1599
BLOCK DIAGRAM
+
CA
−
+ OSC
PMOS
M1
−PWM
+
Control
Logic
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VCCP
LX
GND
PIN DESCRIPTIONS
Pin No
Symbol
1 FB
2 GND
3 LX
4 VCCP
5 VCC
6 COMP
EP PAD
Figure 1. Block Diagram
Description
Feedback input pin of the Error Amplifier. Connect a resistor divider from the converter’s output
voltage 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.
Output of the Gm Amplifier and compensation node. Connect a series R−C network from this pin to
GND for control loop regulation.
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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Vin
2.8 V − 5.5 V
NCP1599
APPLICATION CIRCUIT
VCCP LX
VCC GND
COMP FB
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Vout
0.8 V − 3.3 V
Figure 2. NCP1599 Application Circuit
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply Pin (Pin 4, 5) to GND
Vin −0.3 V (DC) to 6.5 V −1.0 V
For T < 100 ns
LX to GND
−0.6 V to Vin + 0.3 V, −1.0 V
For T < 100 ns
All other pins
−0.3 V to 6.0 V, −1.0 V
For T < 100 ns
Operating Temperature Range
TA −40 to +85 °C
Junction Temperature
TJ −40 to +150 °C
Storage Temperature Range
TS −55 to +150 °C
Thermal Resistance Junction−to−Air (Note 1)
RqJA
68.5 °C/W
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. RqJA measured on approximately 1x1 inch sq. of 1 oz. Copper.
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