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PDF ADP2164 Data sheet ( Hoja de datos )
| Número de pieza | ADP2164 | |
| Descripción | Step-Down DC-to-DC Regulator | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Data Sheet
FEATURES
4 A continuous output current
43 mΩ and 29 mΩ integrated FET
±1.5% output accuracy
Input voltage range: 2.7 V to 6.5 V
Output voltage: 0.6 V to VIN
Switching frequency
Fixed frequency: 600 kHz or 1.2 MHz
Adjustable frequency: 500 kHz to 1.4 MHz
Synchronizable from 500 kHz to 1.4 MHz
Selectable synchronize phase shift: 0° or 180°
Current mode architecture
Precision enable input
Power-good output
Voltage tracking input
Integrated soft start
Internal compensation
Starts up into a precharged output
UVLO, OVP, OCP, and thermal shutdown
Available in 16-lead, 4 mm × 4 mm LFCSP package
APPLICATIONS
Point-of-load conversion
Communications and networking equipment
Industrial and instrumentation
Consumer electronics
GENERAL DESCRIPTION
The ADP2164 is a 4 A, synchronous, step-down dc-to-dc regulator
in a compact 4 mm × 4 mm LFCSP package. The regulator uses a
current mode, constant frequency pulse-width modulation (PWM)
control scheme for excellent stability and transient response.
The input voltage range of the ADP2164 is 2.7 V to 6.5 V. The
output voltage of the ADP2164 is adjustable from 0.6 V to the
input voltage (VIN). The ADP2164 is also available in six preset
output voltage options: 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V.
6.5 V, 4 A, High Efficiency,
Step-Down DC-to-DC Regulator
ADP2164
TYPICAL APPLICATIONS CIRCUIT
R1
R2 C1
VIN
CIN
PGOOD VIN
PVIN
EN SW
SYNC ADP2164 FB
TRK
PGND
RT
RT
GND
L
VOUT
COUT
Figure 1.
100
95
90
85
80
75
70
65
60
55
50
0
VIN = 5V
fS = 600kHz
VOUT = 1.2V
VOUT = 3.3V
0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT (A)
Figure 2. Efficiency vs. Output Current
3.5
4.0
The ADP2164 integrates a pair of low on-resistance P-channel
and N-channel internal MOSFETs to maximize efficiency and
minimize external component count. The 100% duty cycle
operation allows low dropout voltage at 4 A output current.
The high, 1.2 MHz PWM switching frequency allows the use of
small external components, and the SYNC input enables multiple
ICs to synchronize out of phase to reduce ripple and eliminate
beat frequencies.
Other key features of the ADP2164 include undervoltage lockout
(UVLO), integrated soft start to limit inrush current at startup,
overvoltage protection (OVP), overcurrent protection (OCP),
and thermal shutdown.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or 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
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.
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Data Sheet
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
PVIN, VIN, SW
FB, SYNC, TRK, RT, EN, PGOOD
PGND to GND
Operating Junction Temperature Range
Storage Temperature Range
Soldering Conditions
Rating
−0.3 V to +7 V
−0.3 V to +7 V
−0.3 V to +0.3 V
−40°C to +125°C
−65°C to +150°C
JEDEC J-STD-020
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
ADP2164
THERMAL RESISTANCE
θJA is measured using natural convection on a JEDEC 4-layer
board. The exposed pad is soldered to the printed circuit board
with thermal vias.
Table 3. Thermal Resistance
Package Type
θJA
16-Lead LFCSP
38.3
Unit
°C/W
ESD CAUTION
Rev. 0 | Page 5 of 20
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Data Sheet
T
TRK
FB
4
CH2 500mV BW M 2.00ms A CH2
CH4 500mV BW T 40.40%
Figure 28. Tracking Function
820mV
60 200
48
MAGNITUDE
36
160
120
24 80
12
PHASE
0
40
0
–12 –40
–24 –80
–36 –120
–48 CROSS FREQUENCY: 57kHz
PHASE MARGIN: 67°
–60
1k
1
10k 100k
FREQUENCY (Hz)
–160
–200
2
1M
Figure 29. Bode Plot at VIN = 5 V, VOUT = 1.0 V, IO = 4 A, fS = 1.2 MHz,
L = 0.68 μH, COUT = 2 × 100 μF
60 200
48
MAGNITUDE
36
160
120
24 80
12
PHASE
0
40
0
–12 –40
–24 –80
–36 –120
–48 CROSS FREQUENCY: 52kHz
PHASE MARGIN: 69°
–60
1k
1
10k 100k
FREQUENCY (Hz)
–160
–200
2
1M
Figure 30. Bode Plot at VIN = 5 V, VOUT = 1.5 V, IO = 4 A, fS = 1.2 MHz,
L = 1 μH, COUT = 47 μF + 100 μF
T
VOUT
1
IL
ADP2164
SW
4
2
CH1 5.00mV
CH2 5.00V
CH4 2.00A Ω
M 400ns
T 30.60%
A CH2
3.30V
Figure 31. Steady Waveform, VIN = 5 V, VOUT = 1.2 V, fS = 1.2 MHz
60 200
48
MAGNITUDE
36
160
120
24 80
12
PHASE
0
40
0
–12 –40
–24 –80
–36 –120
–48 CROSS FREQUENCY: 61kHz
PHASE MARGIN: 69°
–60
1k
1
10k 100k
FREQUENCY (Hz)
–160
–200
2
1M
Figure 32. Bode Plot at VIN = 5 V, VOUT = 1.2 V, IO = 4 A, fS = 1.2 MHz,
L = 0.68 μH, COUT = 47 μF + 100 μF
60 200
48
MAGNITUDE
36
160
120
24 80
12 PHASE
0
40
0
–12 –40
–24 –80
–36 –120
–48 CROSS FREQUENCY: 61kHz
PHASE MARGIN: 66°
–60
1k
1
10k 100k
FREQUENCY (Hz)
–160
–200
2
1M
Figure 33. Bode Plot at VIN = 5 V, VOUT = 1.8 V, IO = 4 A, fS = 1.2 MHz,
L = 1 μH, COUT = 100 μF
Rev. 0 | Page 11 of 20
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| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet ADP2164.PDF ] | |
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