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ADP5303 の電気的特性と機能
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ADP5303のメーカーはAnalog Devicesです、この部品の機能は「Ultralow Power Step-Down Regulator」です。 |
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製品の詳細 ( Datasheet PDF )
| 部品番号 ADP5303 |
| 部品説明 Ultralow Power Step-Down Regulator |
| メーカ Analog Devices |
ロゴ |
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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
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
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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
1 Page
ADP5303
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Typical Application Circuit ............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Detailed Functional Block Diagram .............................................. 3
Specifications..................................................................................... 4
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ...................................................................... 14
Buck Regulator Operational Modes......................................... 14
Oscillator and Synchronization ................................................ 14
Adjustable and Fixed Output Voltages .................................... 14
Undervoltage Lockout (UVLO) ............................................... 15
Enable/Disable ............................................................................ 15
Current Limit .............................................................................. 15
REVISION HISTORY
6/2016—Rev. 0 to Rev. A
Change to Features Section and General Description
Section................................................................................................ 1
Change to SYNC Clock Range Parameter, Table 1 ...................... 4
Change to Table 4 ............................................................................. 7
Change to Oscillator and Synchronization Section ................... 14
Changes to Table 8.......................................................................... 20
10/2015—Revision 0: Initial Version
Data Sheet
Short-Circuit Protection............................................................ 15
Soft Start ...................................................................................... 15
Startup with Precharged Output .............................................. 15
100% Duty Cycle Operation ..................................................... 15
Active Discharge......................................................................... 15
VINOK Function........................................................................ 15
Thermal Shutdown .................................................................... 15
Applications Information .............................................................. 16
External Component Selection ................................................ 16
Selecting the Inductor................................................................ 16
Output Capacitor........................................................................ 16
Input Capacitor........................................................................... 17
Efficiency..................................................................................... 17
Printed Circuit Board Layout Recommendations ................. 18
Typical Application Circuits ......................................................... 19
Factory Programmable Options ................................................... 20
Outline Dimensions ....................................................................... 21
Ordering Guide .......................................................................... 21
Rev. A | Page 2 of 21
3Pages
Data Sheet
ADP5303
Parameter
Hysteresis of Threshold Accuracy from
Active Mode to Standby Mode
Feedback Bias Current
SW PIN
High-Side Power FET On Resistance
Low-Side Power FET On Resistance
Current-Limit in PWM Mode
Peak Current in Hysteresis Mode
Minimum On Time
VINOK PIN
VINOK Monitor Threshold Range
VINOK Monitor Accuracy
VINOK Monitor Threshold Hysteresis
VINOK Rising Delay
VINOK Falling Delay
Leakage Current for VINOK Pin
Output Low Voltage for VINOK Pin
SOFT START
Default Soft Start Time
Start-Up Delay
COUT DISCHARGE SWITCH ON RESISTANCE
THERMAL SHUTDOWN
Threshold
Hysteresis
Symbol
VFB_HYS (HYS)
IFB
Min Typ Max
1
66 95
25 45
RDS (ON) H
RDS (ON) L
ILIM_PWM
ILIM_HYS
tMIN_ON
386 520
299 470
800 1000 1200
265
40 70
VVINOK(RISE)
VVINOK(HYS)
tVINOK_RISE
tVINOK_FALL
IVINOK_LEAKAGE
VVINOK_LOW
2.05
−1.5
−3
1.5
190
130
0.1
50
5.15
+1.5
+3
1
100
tSS
tSTART_DELAY
RDIS
350
2
290
TSHDN
THYS
142
127
1 SYNC refers to the synchronization function of the multifunction SYNC/MODE pin only.
Unit Test Conditions/Comments
%
nA Output Option 0, VOUT = 2.5 V
nA Output Option 1, VOUT = 1.3 V
mΩ Pin to pin measurement
mΩ Pin to pin measurement
mA SYNC/MODE = high
mA SYNC/MODE = low
ns
V Factory programmable
% TJ = 25°C
% −40°C ≤ TJ ≤ +125°C
%
µs
µs
µA
mV IVINOK = 100 µA
µs Factory trim, 1 bit (350 µs, 2800 µs)
ms Delay from the EN pin being pulled high
Ω
°C
°C
Rev. A | Page 5 of 21
6 Page
合計 : 22 ページ |
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| 部品番号 | 部品説明 | メーカ |
| ADP5300 | Ultralow Power Step-Down Regulator | Analog Devices |
| ADP5301 | Ultralow Power Step-Down Regulator | Analog Devices |
| ADP5302 | Ultralow Power Step-Down Regulator | Analog Devices |
| ADP5303 | Ultralow Power Step-Down Regulator | Analog Devices |