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PDF ADP2390 Data sheet ( Hoja de datos )
| Número de pieza | ADP2390 | |
| Descripción | 12A Step-Down Regulator | |
| Fabricantes | Analog Devices | |
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Data Sheet
18 V, 12 A Step-Down Regulator with
Programmable Current Limit
ADP2389/ADP2390
FEATURES
Input voltage: 4.5 V to 18 V
Continuous output current: 12 A
Integrated MOSFETs: 17 mΩ high-side/4.5 mΩ low-side
0.6 V ± 0.5% reference voltage
Programmable switching frequency range: 200 kHz to 2200 kHz
Enhanced transient response
Programmable current limit with ±10% accuracy
Precision enable and power good
External compensation and soft start
PFM mode (ADP2390 only)
Start up into a precharged output
Supported by the ADIsimPower design tool
APPLICATIONS
Communication infrastructure
Networking and servers
Industrial and instrumentation
Healthcare and medical
Intermediate power rail conversions
DC-to-DC point of load applications
TYPICAL APPLICATIONS CIRCUIT
VIN
CIN
RFTW RILIM RT
CVREG
VIN
PVIN
EN
PGOOD
BST
SW
ADP2389/
ADP2390
FTW
ILIM
RT
VREG
GND
FB
COMP
SS
PGND
CBST
L
VOUT
COUT
RTOP
RBOT
RC
CSS CC
Figure 1.
GENERAL DESCRIPTION
The ADP2389/ADP2390 are current mode control, synchronous
step-down, dc-to-dc regulators. They integrate a 17 mΩ high-side
power MOSFET and a 4.5 mΩ synchronous rectifier MOSFET to
provide a high efficiency solution. The ADP2390 operates in pulse
frequency modulation (PFM) mode to improve the system
efficiency at light load. The ADP2389/ADP2390 run from an
input voltage of 4.5 V to 18 V and can deliver up to 12 A of output
current. The output voltage can be adjusted to 0.6 V and the
switching frequency can be programmed between 200 kHz to
2200 kHz.
The ADP2389/ADP2390 target high performance applications
that require high efficiency and design flexibility. External
compensation and soft start provide design flexibility. The power-
good output and precision enable input provide simple and reliable
power sequencing. An enhanced transient response feature
improves the load transient performance, which reduces the
output capacitance. Programmable current limit allows the user
to optimized the inductor design and provide a compact solution.
Other key features include undervoltage lockout (UVLO),
overvoltage protection (OVP), overcurrent protection (OCP),
and thermal shutdown (TSD).
The ADP2389/ADP2390 operates over a −40°C to +125°C
junction temperature range and is available in 32-lead, 5 mm ×
5 mm LFCSP package.
100
95
90
85
80
75
70
VOUT = 1.2V
65 VOUT = 1.8V
VOUT = 3.3V
60 VOUT = 5.0V
0 1 2 3 4 5 6 7 8 9 10 11 12
OUTPUT CURRENT (A)
Figure 2. ADP2389 Efficiency vs. Output Current, VIN = 12 V, fSW = 300 kHz
Rev. 0
Document Feedback
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responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
Parameter
PGOOD
FB Threshold
Rising
Falling
FB Hysteresis
Rising
Falling
Power-Good Deglitch Time
PGOOD Leakage Current
PGOOD Output Low Voltage
EN
EN Rising Threshold
EN Falling Threshold
EN Source Current
THERMAL
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
1 Pin-to-pin measurement.
2 Guaranteed by design.
Symbol
Test Conditions/Comments
PGOOD from low to high
PGOOD from high to low
VPGOOD = 5 V
IPGOOD = 1 mA
EN voltage < 1.1 V
EN voltage > 1.2 V
ADP2389/ADP2390
Min Typ Max Units
106 110 114 %
86 90 94 %
5
5
16
16
0.01 0.1
150 260
%
%
Cycles
Cycles
µA
mV
1.2
1.02 1.1
6.1
1.3
1.28 V
V
µA
µA
150 °C
25 °C
Rev. 0 | Page 5 of 23
5 Page 
Data Sheet
T
EN
2
VOUT
1
PGOOD
3
IL
4
CH1 1.00V BW CH2 10.0V BW M1.00ms A CH3
CH3 5.00V BW CH4 5.00A Ω BW T 50.40%
Figure 23. Precharged Output
2.90V
T
VOUT (AC)
1
IOUT
4
CH1 50.0mV BW
M 200µs A CH4
CH4 5.00A Ω BW T 20.00%
6.00A
Figure 24. Load Transient Response with Fast Transient Enable,
IOUT = 2.4 A to 9.6 A
T
2 SW
VOUT
1
IL
4
CH1 1.00V BW CH2 10.0V BW M1.00ms A CH1
CH4 10.0A Ω BW T 20.20%
Figure 25. Output Short Entry
1.08V
ADP2389/ADP2390
T
VOUT (AC)
1
IOUT
4
CH1 50.0mV BW
M 200µs A CH4
CH4 5.00A Ω BW T 20.00%
4.90A
Figure 26. Load Transient Response, IOUT = 2.4 A to 9.6 A
T
VOUT (AC)
1
PVIN
SW
3
2
CH1 10.0mV BW CH2 10.0V BW M1.00ms A CH3
CH3 5.00V BW
T 20.40%
11.0V
Figure 27. Line Transient Response, VPVIN from 8 V to 14 V, IOUT = 12 A
T
SW
2
VOUT
1
IL
4
CH1 1.00V
BW CH2 10.0V BW M10.0ms A CH1
CH4 10.0A Ω BW T 80.20%
Figure 28. Output Short Recovery
1.06V
Rev. 0 | Page 11 of 23
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet ADP2390.PDF ] | |
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