ADP5303 Datasheet PDF - Analog Devices
| Part Number | ADP5303 | |
| Description | Ultralow Power Step-Down Regulator | |
| Manufacturers | Analog Devices | |
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Data Sheet
50 mA/500 mA, Ultralow Power Step-Down
Regulator With Battery Voltage Monitor
ADP5303
FEATURES
Input supply voltage range: 2.15 V to 6.50 V
Operates down to 2.00 V
Ultralow 240 nA quiescent current with no load
Selectable output voltages of 1.2 V to 3.6 V, or 0.8 V to 5.0 V
±1.5% output accuracy over the full temperature range in
pulse-width modulation (PWM) mode
Selectable hysteresis mode or PWM operation mode
Output current
Up to 50 mA in hysteresis mode
Up to 500 mA in PWM mode
VINOK flag to monitor input battery voltage
100% duty cycle operation mode
2 MHz switching frequency with optional synchronization
input from 1.5 MHz to 2.5 MHz
Quick output discharge (QOD) option
UVLO, OCP, and TSD protection
9-ball, 1.65 mm × 1.87 mm WLCSP
Junction temperature: −40°C to +125°C
APPLICATIONS
Energy (gas, water) metering
Portable and battery-powered equipment
Medical applications
Keep-alive power supply
GENERAL DESCRIPTION
The ADP5303 is high efficiency, ultralow quiescent current
step-down regulator that draws only 240 nA quiescent current
to regulate the output at no load.
The ADP5303 runs from an input voltage of 2.15 V to 6.50 V,
allowing the use of multiple alkaline or NiMH cells, Li-Ion cells,
or other power sources. The output voltage is selectable from 0.8 V
to 5.0 V by an external VID resistor and a factory fuse. The total
solution requires only four tiny external components.
The ADP5303 can operate between hysteresis mode and PWM
mode via the SYNC/MODE pin. In hysteresis mode, the regulator
achieves excellent efficiency at less than 1 mW and provides up
to 50 mA of output current. In PWM mode, the regulator produces
a lower output ripple and supplies up to 500 mA of output current.
The flexible configuration capability during operation of the device
enables very efficient power management to meet both long battery
life and low system noise requirements.
TYPICAL APPLICATION CIRCUIT
VIN =
2.15V TO 6.50V
10µF
ON
OFF
PVIN
EN
ADP5303
(WLCSP-9)
SW
PGND
2.2µH
10µF
VOUT
PWM
HYS
SYNC/
MODE
VINOK
FB
VID
AGND
VID0: 1.2V VID8: 2.5V
VID1: 1.5V VID9: 2.6V
VID2: 1.8V VID10: 2.7V
R0
VID3: 2.0V
VID4: 2.1V
VID11: 2.8V
VID12: 2.9V
VID5: 2.2V VID13: 3.0V
VID6: 2.3V VID14: 3.3V
VID7: 2.4V VID15: 3.6V
Figure 1.
The ADP5303 integrates an ultralow power comparator with a
factory programmable voltage reference to monitor the input
battery voltage. The regulator runs at a 2 MHz switching frequency
in PWM mode and the SYNC/MODE pin can be synchronized
to an external clock from 1.5 MHz to 2.5 MHz.
Other key features in the ADP5303 include separate enabling,
QOD, and safety features such as overcurrent protection (OCP),
thermal shutdown (TSD), and input undervoltage lockout
(UVLO).
The ADP5303 is available in 9-ball, 1.65 mm × 1.87 mm
WLCSP package rated for the −40°C to +125°C junction
temperature range.
Rev. A
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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
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2015–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
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ADP5303
Data Sheet
SPECIFICATIONS
VIN = 3.6 V, VOUT = 2.5 V, TJ = −40°C to +125°C for minimum and maximum specifications, and TA = 25°C for typical specifications,
unless otherwise noted.
Table 1.
Parameter
INPUT SUPPLY VOLTAGE RANGE
SHUTDOWN CURRENT
QUIESCENT CURRENT
Operating Quiescent Current in Hysteresis
Mode
Operating Quiescent Current in PWM Mode
UNDERVOLTAGE LOCKOUT
UVLO Threshold
Rising
Falling
OSCILLATOR CIRCUIT
Switching Frequency in PWM Mode
Feedback (FB) Threshold of Frequency Fold
SYNCHRONIZATION THRESHOLD1
SYNC Clock Range
SYNC High Level Threshold
SYNC Low Level Threshold
SYNC Duty Cycle Range
SYNC/MODE Leakage Current
MODE TRANSITION
Transition Delay from Hysteresis Mode to
PWM Mode
EN PIN
Input Voltage Threshold
High
Low
Input Leakage Current
FB PIN
Output Options by VID Resistor
PWM Mode
Fixed VID Code Voltage Accuracy
Adjustable VID Code Voltage Accuracy
Hysteresis Mode
Fixed VID Code Threshold Accuracy from
Active Mode to Standby Mode
Adjustable VID Code Threshold Accuracy
from Active Mode to Standby Mode
Symbol
VIN
ISHUTDOWN
IQ_HYS
IQ_PWM
UVLO
VUVLO_RISING
VUVLO_FALLING
fSW
VOSC_FOLD
SYNCCLOCK
SYNCHIGH
SYNCLOW
SYNCDUTY
ISYNC_LEAKAGE
tHYS_TO_PWM
VIH
VIL
IEN_LEAKAGE
VOUT_OPT
VFB_PWM_FIX
VFB_PWM_ADJ
VFB_HYS_FIX
VFB_HYS_ADJ
Min Typ Max
2.15 6.50
18 40
18 130
240 360
240 520
640 1500
425 630
Unit
V
nA
nA
Test Conditions/Comments
VEN = 0 V, −40°C ≤ TJ ≤ +85°C
VEN = 0 V, −40°C ≤ TJ ≤ +125°C
nA −40°C ≤ TJ ≤ +85°C
nA −40°C ≤ TJ ≤ +125°C
nA 100% duty cycle operation, VIN = 3.0 V,
VOUT set to 3.3 V
µA
2.06 2.14
1.90 2.00
V
V
1.7 2.0 2.3
0.3
MHz
V
1.5
1.2
100
50
2.5
0.4
1/fSW −
150
150
MHz
V
V
ns
nA
VSYNC/MODE = 3.6 V
20 Clock SYNC/MODE goes logic high from
cycles logic low
1.2
0.8
−0.6
−1.2
−1.5
−0.75
−2.5
−3
V
0.4 V
25 nA
5.0 V
+0.6 %
+1.2 %
+1.5 %
+0.75 %
+2.5 %
+3 %
0.8 V to 5.0 V in various factory options
TJ = 25°C, output voltage setting via
factory fuse
−40°C ≤ TJ ≤ +125°C
Output voltage setting via the VID
resistor
TJ = 25°C
−40°C ≤ TJ ≤ +125°C
−40°C ≤ TJ ≤ +125°C
Rev. A | Page 4 of 21
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