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PDF ADP5037 Data sheet ( Hoja de datos )
| Número de pieza | ADP5037 | |
| Descripción | 800 mA Buck Regulators | |
| Fabricantes | Analog Devices | |
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Data Sheet
Dual 3 MHz, 800 mA Buck
Regulators with Two 300 mA LDOs
ADP5037
FEATURES
load is above a predefined threshold, the buck regulators
Main input voltage range: 2.3 V to 5.5 V
Two 800 mA buck regulators and two 300 mA LDOs
24-lead, 4 mm × 4 mm LFCSP package
operate in PWM mode. When the load current falls below a
predefined threshold, the regulator operates in power save
mode (PSM), improving the light-load efficiency.
Regulator accuracy: ±1.8%
Table 1. Family Models
Factory programmable or external adjustable VOUTx
3 MHz buck operation with forced PWM and auto PWM/PSM
modes
BUCK1/BUCK2: output voltage range from 0.8 V to 3.8 V
LDO1/LDO2: output voltage range from 0.8 V to 5.2 V
LDO1/LDO2: input supply voltage from 1.7 V to 5.5 V
LDO1/LDO2: high PSRR and low output noise
APPLICATIONS
Model Channels
ADP5023 2 Buck, 1 LDO
ADP5024 2 Buck, 1 LDO
ADP5034 2 Buck, 2 LDOs
ADP5037 2 Buck, 2 LDOs
Maximum
Current
800 mA,
300 mA
1.2 A,
300 mA
1.2 A,
300 mA
800 mA,
300 mA
Package
LFCSP (CP-24-10)
LFCSP (CP-24-10)
LFCSP (CP-24-10),
TSSOP (RE-28-1)
LFCSP (CP-24-10)
Power for processors, ASICS, FPGAs, and RF chipsets
Portable instrumentation and medical devices
Space constrained devices
GENERAL DESCRIPTION
ADP5033 2 Buck, 2 LDOs with 800 mA,
2 EN pins
300 mA
WLCSP (CB-16-8)
The two bucks operate out of phase to reduce the input capaci-
tor requirement. The low quiescent current, low dropout voltage,
and wide input voltage range of the ADP5037 LDOs extend the
The ADP5037 combines two high performance buck regulators
battery life of portable devices. The ADP5037 LDOs maintain
and two low dropout (LDO) regulators in a small, 24-lead 4 mm ×
power supply rejection greater than 60 dB for frequencies as
4 mm LFCSP to meet demanding performance and board space
high as 10 kHz while operating with a low headroom voltage.
requirements.
http://www.DataSheet4U.com/ Regulators in the ADP5037 are activated though dedicated
The high switching frequency of the buck regulators enables tiny
enable pins. The default output voltages can be externally set in
multilayer external components and minimizes the board space.
the adjustable version or factory programmable to a wide range
When the MODE pin is set high, the buck regulators operate in
of preset values in the fixed voltage version.
forced PWM mode. When the MODE pin is set low and the
TYPICAL APPLICATION CIRCUIT
2.3V TO
5.5V
1.7V TO
5.5V
CAVIN
0.1µF
C1
4.7µF
ON
OFF
AVIN
VIN1
EN1
HOUSEKEEPING
BUCK1
EN1 MODE
C2
4.7µF
VIN2
EN2
C3
1µF
ON
OFF
C4
1µF
EN3
VIN3
EN4
VIN4
MODE
BUCK2
EN2
EN3 LDO1
(ANALOG)
EN4
LDO2
(DIGITAL)
ADP5037
AGND
VOUT1
SW1
FB1
PGND1
MODE
VOUT2
SW2
FB2
PGND2
VOUT3
FB3
VOUT4
FB4
L1 1µH
R1
R2
VOUT1 AT
800mA
C5
10µF
PWM
PSM/PWM
L2 1µH
R3
R4
R5
R6
VOUT2 AT
800mA
C6
10µF
VOUT3 AT
300mA
C7
1µF
R7
R8
VOUT4 AT
300mA
C8
1µF
Figure 1.
Rev. D
Document Feedback
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 ©2011–2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
Data Sheet
ADP5037
Parameter
VOLTAGE FEEDBACK
DROPOUT VOLTAGE4
Symbol
VFB3, VFB4
VDROPOUT
CURRENT-LIMIT THRESHOLD5
ACTIVE PULL-DOWN
OUTPUT NOISE
Regulator LDO1
Regulator LDO2
POWER SUPPLY REJECTION
RATIO
Regulator LDO1
ILIMIT3, ILIMIT4
RPDWN-L
NOISELDO1
NOISELDO2
PSRR
Regulator LDO2
Test Conditions/Comments
VOUT3 = VOUT4 = 5.2 V, IOUT3 = IOUT4 = 300 mA
VOUT3 = VOUT4 = 3.3 V, IOUT3 = IOUT4 = 300 mA
VOUT3 = VOUT4 = 2.5 V, IOUT3 = IOUT4 = 300 mA
VOUT3 = VOUT4 = 1.8 V, IOUT3 = IOUT4 = 300 mA
Channel disabled
10 Hz to 100 kHz, VIN3 = 5 V, VOUT3 = 2.8 V
10 Hz to 100 kHz, VIN4 = 5 V, VOUT4 = 1.2 V
10 kHz, VIN3 = 3.3 V, VOUT3 = 2.8 V, IOUT3 = 1 mA
100 kHz, VIN3 = 3.3 V, VOUT3 = 2.8 V, IOUT3 = 1 mA
1 MHz, VIN3 = 3.3 V, VOUT3 = 2.8 V, IOUT3 = 1 mA
10 kHz, VIN4 = 1.8 V, VOUT4 = 1.2 V, IOUT4 = 1 mA
100 kHz, VIN4 = 1.8 V, VOUT4 = 1.2 V, IOUT4 = 1 mA
1 MHz, VIN4 = 1.8 V, VOUT4 = 1.2 V, IOUT4 = 1 mA
Min
0.491
335
Typ
0.5
50
75
100
180
600
600
Max
0.509
140
Unit
V
mV
mV
mV
mV
mA
Ω
100 µV rms
60 µV rms
60 dB
62 dB
63 dB
54 dB
57 dB
64 dB
1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).
2 This is the input current into VIN3/VIN4, which is not delivered to the output load.
3 Based on an endpoint calculation using 1 mA and 300 mA loads.
4 Dropout voltage is defined as the input-to-output voltage differential when the input voltage is set to the nominal output voltage. This applies only to output voltages
above 1.7 V.
5 Current-limit threshold is defined as the current at which the output voltage drops to 90% of the specified typical value. For example, the current limit for a 3.0 V
output voltage is defined as the current that causes the output voltage to drop to 90% of 3.0 V, or 2.7 V.
INPUT AND OUTPUT CAPACITOR, RECOMMENDED SPECIFICATIONS
TA = −40°C to +125°C, unless otherwise specified.
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Table 5.
Parameter
NOMINAL INPUT AND OUTPUT CAPACITOR RATINGS
BUCK1, BUCK2 Input Capacitor Ratings
BUCK1, BUCK2 Output Capacitor Ratings
LDO1 Input and Output Capacitor Ratings
CAPACITOR ESR
Symbol
CMIN1, CMIN2
CMIN1, CMIN2
CMIN3, CMIN4
RESR
Min
4.7
10
1.0
0.001
Typ Max Unit
40 µF
40 µF
µF
1Ω
1 The minimum input and output capacitance should be greater than 0.70 µF over the full range of operating conditions. The full range of operating conditions in the
application must be considered during device selection to ensure that the minimum capacitance specification is met. X7R- and X5R-type capacitors are recommended;
Y5V and Z5U capacitors are not recommended for use because of their poor temperature and dc bias characteristics.
Rev. D | Page 5 of 28
5 Page 
Data Sheet
T
VOUT
1
ISW
2
SW
T
VIN
VOUT
1
SW
ADP5037
4
CH1 50mV BW CH2 500mA Ω
CH4 2.00V BW
M 400ns A CH2
T 28.40%
220mA
Figure 21. Typical Waveforms, VOUT1 = 3.3 V, IOUT1 = 30 mA, PWM Mode
T
VOUT
1
ISW
2
SW
43
CH1 50.0mV BW
M 1.00ms
CH3 1.00V BW CH4 2.00V BW
T 30.40%
A CH3
4.80V
Figure 24. BUCK2 Response to Line Transient, VIN2 = 4.5 V to 5.0 V,
VOUT2 = 1.8 V, PWM Mode
T
SW
4
VOUT
1
4
CH1 50mV BW CH2 500mA Ω
CH4 2.00V BW
M 400ns A CH2
T 28.40%
220mA
Figure 22. Typical Waveforms, VOUT2 = 1.8 V, IOUT2 = 30 mA, PWM Mode
T
VIN
VOUT
1
SW
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IOUT
2
CH1 50.0mV BW CH2 50.0mA Ω BW M 20.0µs A CH2 356mA
CH4 5.00V BW
T 60.000µs
Figure 25. BUCK1 Response to Load Transient, IOUT1 from 1 mA to 50 mA,
VOUT1 = 3.3 V, Auto Mode
SW
4
T
VOUT
1
3
CH1 50.0mV BW
M 1.00ms
CH3 1.00V BW CH4 2.00V BW
T 30.40%
A CH3
4.80V
Figure 23. BUCK1 Response to Line Transient, Input Voltage from 4.5 V to
5.0 V, VOUT1 = 3.3 V, PWM Mode
IOUT
2
CH1 50.0mV BW CH2 50.0mA Ω BW M 20.0µs A CH2
CH4 5.00V BW
T 22.20%
379mA
Figure 26. BUCK2 Response to Load Transient, IOUT2 from 1 mA to 50 mA,
VOUT2 = 1.8 V, Auto Mode
Rev. D | Page 11 of 28
11 Page | ||
| Páginas | Total 28 Páginas | |
| PDF Descargar | [ Datasheet ADP5037.PDF ] | |
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