OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

NCP1593AMNTWG

P1-P3P4-P6P7-P9P10-P12P13-P13
© Semiconductor Components Industries, LLC, 2012
July, 2012 − Rev. 2
1 Publication Order Number:
NCP1593/D
NCP1593A, NCP1593B
1 MHz, 3 A Synchronous
Buck Regulator
The NCP1593 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 NCP1593 utilizes
internally compensated current mode control to provide good transient
response, ease of implementation and excellent loop stability. It
regulates input voltages from 4.0 V to 5.5 V down to an output voltage
as low as 0.6 V and is able to supply up to 3 A of load current.
The NCP1593 includes an internally fixed switching frequency
(F
SW), and an internal soft−start to limit inrush current. Other features
include cycle−by−cycle current limiting, 100% duty cycle operation,
short− circuit protection, power saving mode and thermal shutdown.
Features
• Wide Input Voltage Range: from 4.0 V to 5.5 V
• Internal 90 mW High−Side P−Channel MOSFET and 60 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 0.6 V
• Diode Emulation During Light Load
• 100% Duty Cycle Operation to Extend the Battery Life
• These are Pb−Free Devices
Applications
• Set−Top Boxes
• DVD Drives and HDD
• LCD Monitors and TVs
• Cable Modems
• USB Modems
• Telecom/Networking/Datacom Equipment
Device Package Shipping
†
ORDERING INFORMATION
NCP1593AMNTWG DFN10
(Pb−Free)
3000 / Tape &
Reel
DFN10
CASE 485C
MARKING
DIAGRAMS
http://onsemi.com
†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.
VCCP
VCCP
VCCA
NC
LX
LX
1
2
3
10
9
8
NCP1593A
(Top View)
PIN CONNECTIONS
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
1593A
ALYWG
G
(Note: Microdot may be in either location)
SSPG 4 7
FBEN 5 6
NCP1593BMNTWG
VCCP
VCCP
VCCA
LX
LX
LX
1
2
3
10
9
8
NCP1593B
(Top View)
NCPG 4 7
FBEN 5 6
1593B
ALYWG
G
DFN10
(Pb−Free)
3000 / Tape &
Reel
GND
GND
NCP1593A, NCP1593B
http://onsemi.com
2
BLOCK DIAGRAM
Figure 1. Block Diagram
−
+
+
+
−
Soft−Start
Power Reset
UVLO
THD
Hiccup
gm
PWM Control
Logic
OSC
+
−
CA
+
NCP1593A
VCCP
LX
PGND
VCC
EN
FB
Vref
PMOS
M1
PG
LX
SS
Power
Good
0.9 x Vref
Rc1
Cc1
Cc2
Ri
PIN DESCRIPTIONS
Pin No Symbol Description
1 NC / LX No connect pin for NCP1593A. The user may ground this pin or leave it floating. / LX pin for NCP1593B
2, 3 LX The drains of the internal MOSFETs. The output inductor should be connected to these pins.
4 PG Open drain output from the Power Good logic. When the FB voltage is within regulation, this is a high
impedance pin. Otherwise it is pulled low.
5 EN Logic input to enable the part. Logic high to turn on the part and a logic low to shut off the part. An intern-
al pullup forces the part into an enable state when no external bias is present on the pin.
6 FB 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 regulated voltage.
7 SS / NC An external capacitor on this pin sets the soft−start ramp time. Leaving this pin open sets the soft−start
time at 500 ms. For NCP1593B this pin is a no connect and should be left floating.
8 V
CC
Input supply pin for internal bias circuitry. Connect a 0.1 mF ceramic bypass capacitor to this pin. Directly
connect the V
CC
pin to the V
CCP
pin on the board.
9, 10 V
CCP
Input for the power stage
EP GND 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.
NCP1593A, NCP1593B
http://onsemi.com
3
APPLICATION CIRCUIT
Figure 2. Recommended Application Circuit
VCCP
VCCA
EN
LX
LX
FB
4.0 V − 5.5 V
V
in
V
out
PG
SS
NC
PGND
9,10
8
5
4
7
2
3
6
1
EP
NCP1593
22
m
F
22
m
F22
m
F
R1
R2
2.2
m
H
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply Pin (Pins 8, 9, 10) to GND V
in
6.5
−0.3 (DC)
−1.0 (t < 100 ns)
V
LX to GND V
in
+ 0.7
V
in
+ 1.0 (t < 20 ns)
−0.7 (DC)
−5.0 (t < 100 ns)
V
All other pins 6.0
−0.3 (DC)
−1.0 (t < 100 ns)
V
Operating Ambient Temperature Range (Note 1) TA −40 to +85 °C
Operating Junction Temperature Range (Note 1) TJ −40 to +125 °C
Maximum Junction Temperature TJ(MAX) +150 °C
Storage Temperature Range TS −55 to +150 °C
Thermal Resistance Junction−to−Air (Note 2) RqJA 68 °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. The maximum package power dissipation limit must not be exceeded.
P
D
+
T
J(max)
* T
A
R
qJA
2. RqJA measured on approximately 1x1 inch sq. of 1 oz. Copper FR−4 or G−10 board.
P1-P3P4-P6P7-P9P10-P12P13-P13

NCP1593AMNTWG

Mfr. #:
Buy NCP1593AMNTWG
Manufacturer:
ON Semiconductor
Description:
Switching Voltage Regulators 3A Switching Regulator EN & PG 3A
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet