NCP1596 PDF даташит
Спецификация NCP1596 изготовлена «ON Semiconductor» и имеет функцию, называемую «1.5 MHz Current Mode PWM Buck Down Converter». |
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Детали детали
Номер произв | NCP1596 |
Описание | 1.5 MHz Current Mode PWM Buck Down Converter |
Производители | ON Semiconductor |
логотип |
12 Pages
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NCP1596, NCP1596A
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1.5 A, 1.5 MHz Current
Mode PWM Buck Down
Converter
The NCP1596/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
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1
6 PIN DFN 3x3
MN SUFFIX
CASE 506AH
MARKING DIAGRAMS
1 N1596
ALYW
G
1 1596A
ALYW
G
N1596/1596A = Specific Device Code
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
G = Pb−Free Package
PIN CONNECTIONS
FB
GND
LX
1596
NC
VCC
VCCP
FB
GND
LX
(Top View)
EN
VCC
VCCP
1596A
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
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, 2009
March, 2009 − Rev. P3
1
Publication Order Number:
NCP1596/D
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NCP1596, NCP1596A
VIN = 4.0 V to 5.5 V
C1
VCCP
NCP1596
VCC
NC/EN GND
LX
FB
L1 VOUT = 0.8 V to 0.9 x VIN
D1 R1
R2
C2
Figure 1. Typical Operating Circuit
ABSOLUTE MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Power Supply (Pins 4, 5)
VIN 6.0
−0.3 (DC)
−1.0 (100 ns)
V
Input / Output Pins
Pins 1, 3, 6
VIO 6.0
−0.3 (DC)
−1.0 (100 ns)
V
Thermal Characteristics
3x3 DFN Plastic Package
Maximum Power Dissipation @ TA = 25°C
Thermal Resistance Junction−to−Air
Operating Junction Temperature Range (Note 4)
Operating Ambient Temperature Range
Storage Temperature Range
Lead Temperature Soldering (10 sec)
PD
RqJA
TJ
TA
Tstg
1450
68.5
−40 to +150
−40 to +85
−55 to +150
230
mW
°C/W
°C
°C
°C
°C
Moisture Sensitivity Level (Note 3)
1.0 −
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.
PD
+
TJ(max) *
RqJA
TA
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NCP1596, NCP1596A
ELECTRICAL CHARACTERISTICS
(VIN = 5.0 V, VOUT = 1.2 V, TA = 25°C for typical value, −40°C ≤ TA ≤ 85°C for min/max values unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Operating Voltage
Under Voltage Lockout Threshold
Under Voltage Lockout hysteresis
PFET Leakage Current (Pins 5, 4)
TA = 25°C
TA = −40°C to 85°C
FEEDBACK VOLTAGE
VIN
VUVLO
VUVLO_HYS
ILEAK−P
4.0
3.2
−
−
−
−
3.5
180
1.0
−
5.5
3.8
−
10
15
FB Input Threshold (TA = −40°C to 85°C)
FB Input Current
THERMAL SHUTDOWN
VFB
0.788
0.800
0.812
IFB − 10 100
Thermal Shutdown Threshold (Note 5)
Hysteresis
PWM SMPS MODE
TSHDN
TSDHYS
−
−
160
30
−
−
Switching Frequency (TA = −40°C to 85°C)
FOSC 1.27 1.5 1.725
Internal PFET ON−Resitance (ILX = 100 mA, VIN = 5.0 V, TA = 25°C) (Note 5) RDS(on)_P
−
0.2
0.3
Minimum Duty Cycle
DMIN
−
0
−
Maximum Duty Cycle
DMAX
− 100
−
Soft−Start Time (VIN = 5.0 V, Vo = 1.2 V, ILOAD = 0 mA, TA = 25°C)
TSS 0.8 1.0 1.2
Main PFET Switch Current Limit (Note 5)
ILIM 2.0 2.5
−
ENABLE − NCP1596A
Enable Threshold High (NCP1596A Only)
Enable Threshold Low
Enable bias current (EN = 0 V)
EFFICIENCY
VEN_H
1.8
−
−
VEN_L
−
−
0.4
IEN − 500 TBD
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 VCCP (VIN = 5 V, VFB = 1.0 V, TA = 25°C)
Quiescent Current Into VCC (VIN = 5 V, VFB = 1.0 V, TA = 25°C)
Shutdown Quiescent Current into VCC and VCCP (NCP1596A Only)
(EN = 0, VIN = 5 V, VFB = 1.0 V, TA = 25°C)
5. Values are design guaranteed.
ICCP − 10
−
ICC
− 500
−
ICC_SD
−
1.0
3.0
Unit
V
V
mV
mA
V
nA
°C
°C
MHz
Ohm
%
%
ms
A
V
V
nA
%
%
mA
mA
mA
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