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NCP1596AMNTWG

P1-P3P4-P6P7-P9P10-P12
© Semiconductor Components Industries, LLC, 2009
June, 2009 − Rev. 0
1 Publication Order Number:
NCP1596A/D
NCP1596A
1.5 A, 1.5 MHz Current
Mode PWM Buck Down
Converter
The NCP1596A is a current mode PWM buck converter with
integrated power switch. It can provide up to 1.5 A output current with
high conversion efficiency. High frequency PWM control scheme can
provide a low output ripple noise. Thus, it allows the usage of small
size passive components to reduce the board space. In a low load
condition, the controller will automatically change to PFM mode
which provides a higher efficiency at low load. Additionally, the
device includes soft−start, thermal shutdown with hysteresis,
cycle−by−cycle current limit, and short circuit protection. This device
is available in a compact 3x3 DFN package.
Features
• High Efficiency up to 90%, 1 A @ 3.3 V, 75% @ 1.2 V
• Fully Internal Compensation
• Low Output Voltage Ripple, 20 mV Typical
• ±1.5% Reference Voltage
• High PWM Switching Frequency, 1.5 MHz
• Automatic PWM / PFM Switchover at Light Load
• Built−in 1 ms Digital Soft Start
• Cycle−by−cycle Current Limit
• Thermal Shutdown with Hysteresis
• Internal UVLO Protection
• Ext. Adjustable Output Voltage
• Low Profile and Minimum External Components
• Designed for use with Ceramic Capacitor
• Compact 3x3 DFN Package
• These are Pb−Free Devices
Typical Applications
• Hard Disk Drives
• USB Power Device
• Wireless and DSL Modems
6 PIN DFN 3x3
MN SUFFIX
CASE 506AH
MARKING DIAGRAM
http://onsemi.com
1
1596A = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
1596A
ALYW
G
1
EN
VCC
VCCP
FB
GND
LX
PIN CONNECTIONS
(Top View)
Device Package Shipping
†
ORDERING INFORMATION
NCP1596AMNTWG DFN6
(Pb−Free)
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.
NCP1596A
http://onsemi.com
2
NCP1596A
VCC
VCCP
EN
LX
FB
GND
R1
R2
C1
C2
L1
V
OUT
= 0.8 V to 0.9 x V
IN
V
IN
= 4.0 V to 5.5 V
Figure 1. Typical Operating Circuit
D1
ABSOLUTE MAXIMUM RATINGS
Rating Symbol Value Unit
Power Supply (Pins 4, 5) V
IN
6.0
−0.3 (DC)
−1.0 (100 ns)
V
Input / Output Pins
Pins 1, 3, 6
V
IO
6.0
−0.3 (DC)
−1.0 (100 ns)
V
Thermal Characteristics
3x3 DFN Plastic Package
Maximum Power Dissipation @ T
A
= 25°C
Thermal Resistance Junction−to−Ambient 0 lfpm
P
D
R
q
JA
1450
68.5
mW
°C/W
Operating Junction Temperature Range (Note 4) T
J
−40 to +150 °C
Operating Ambient Temperature Range T
A
−40 to +85 °C
Storage Temperature Range T
stg
−55 to +150 °C
Lead Temperature Soldering (10 sec) 230 °C
Moisture Sensitivity Level (Note 3) MSL 1 −
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.
NOTE: ESD data available upon request.
1. This device series contains ESD protection and exceeds the following tests:
Human Body Model (HBM) 2.0 kV per JEDEC standard: JESD22−A114.
Machine Model (MM) 200 V per JEDEC standard: JESD22−A115.
2. Latch−up Current Maximum Rating: 150 mA per JEDEC standard: JESD78.
3. Moisture Sensitivity Level (MSL): 1 per IPC/JEDEC standard: J−STD−020A.
4. The maximum package power dissipation limit must not be exceeded.
P
D
+
T
J(max)
* T
A
R
qJA
NCP1596A
http://onsemi.com
3
ELECTRICAL CHARACTERISTICS
(V
IN
= 5.0 V, V
OUT
= 1.2 V, T
A
= 25°C for typical value, −40°C ≤ T
A
≤ 85°C for min/max values unless otherwise noted)
Characteristic
Symbol Min Typ Max Unit
Operating Voltage V
IN
4.0 − 5.5 V
Under Voltage Lockout Threshold V
UVLO
3.2 3.5 3.8 V
Under Voltage Lockout hysteresis V
UVLO_HYS
− 180 − mV
PFET Leakage Current (Pins 5, 4)
T
A
= 25°C
T
A
= −40°C to 85°C
I
LEAK−P
−
−
1.0
−
10
15
mA
FEEDBACK VOLTAGE
FB Input Threshold (T
A
= −40°C to 85°C) V
FB
0.788 0.800 0.812 V
FB Input Current I
FB
− 10 100 nA
THERMAL SHUTDOWN
Thermal Shutdown Threshold (Note 5)
T
SHDN
− 160 − °C
Hysteresis (Note 5) T
SDHYS
− 30 − °C
PWM SMPS MODE
Switching Frequency (T
A
= −40°C to 85°C) F
OSC
1.27 1.5 1.725 MHz
Internal PFET ON−Resitance (I
LX
= 100 mA, V
IN
= 5.0 V, T
A
= 25°C) (Note 5) R
DS(on)_P
− 0.2 0.3 Ohm
Minimum Duty Cycle D
MIN
− 0 − %
Maximum Duty Cycle D
MAX
− 100 − %
Soft−Start Time (V
IN
= 5.0 V, V
o
= 1.2 V, I
LOAD
= 0 mA, T
A
= 25°C) T
SS
0.8 1.0 1.2 ms
Main PFET Switch Current Limit (Note 5) I
LIM
2.0 2.5 − A
ENABLE
Enable Threshold High
V
EN_H
1.8 − − V
Enable Threshold Low V
EN_L
− − 0.4 V
Enable bias current (EN = 0 V) I
EN
− 500 − nA
EFFICIENCY
Output Load Current 10 mA @ 1.2 V (Note 5)
h
− 50 − %
Output Load Current 100 mA to 1.2 A @ 1.2 V (Note 5)
h
− 70 − %
TOTAL DEVICE
Quiescent Current Into V
CCP
(V
IN
= 5 V, V
FB
= 1.0 V, T
A
= 25°C) I
CCP
− 10 −
mA
Quiescent Current Into V
CC
(V
IN
= 5 V, V
FB
= 1.0 V, T
A
= 25°C) I
CC
− 500 −
mA
Shutdown Quiescent Current into V
CC
and V
CCP
(EN = 0, V
IN
= 5 V, V
FB
= 1.0 V, T
A
= 25°C)
I
CC_SD
− 1.0 3.0
mA
5. Values are design guaranteed.
P1-P3P4-P6P7-P9P10-P12

NCP1596AMNTWG

Mfr. #:
Buy NCP1596AMNTWG
Manufacturer:
ON Semiconductor
Description:
Switching Controllers 1.5A BUCK DOWN CONVERTER
Lifecycle:
New from this manufacturer.
Delivery:
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