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ADP2140 데이터시트 PDF




Analog Devices에서 제조한 전자 부품 ADP2140은 전자 산업 및 응용 분야에서
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부품번호 ADP2140 기능
기능 Low Quiescent Current Buck
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ADP2140 데이터시트, 핀배열, 회로
3 MHz, 600 mA, Low Quiescent Currentwww.DataSheet4U.com
Buck with 300 mA LDO Regulator
ADP2140
FEATURES
Input voltage range: 2.3 V to 5.5 V
LDO input (VIN2) 1.65 V to 5.5 V
Buck output voltage range: 1.0 V to 3.3 V
LDO output voltage range: 0.8 V to 3.3 V
Buck output current: 600 mA
LDO output current: 300 mA
LDO quiescent current: 22 μA with zero load
Buck quiescent current: 20 μA in PSM mode
Low shutdown current: <0.3 μA
Low LDO dropout 110 mV @ 300 mA load
High LDO PSRR
65 dB @ 10 kHz at VOUT2 = 1.2 V
55 dB @ 100 kHz at VOUT2 = 1.2 V
Low noise LDO: 40 μV rms at VOUT2 = 1.2 V
Initial accuracy: ±1%
Current-limit and thermal overload protection
Power-good indicator
Optional enable sequencing
10-lead 0.75 mm × 3 mm × 3 mm LFCSP package
APPLICATIONS
Mobile phones
Personal media players
Digital camera and audio devices
Portable and battery-powered equipment
GENERAL DESCRIPTION
The ADP2140 includes a high efficiency, low quiescent 600 mA
stepdown dc-to-dc converter and a 300 mA LDO packaged in a
small 10-lead 3 mm × 3 mm LFCSP. The total solution requires
only four tiny external components.
The buck regulator uses a proprietary high speed current-mode,
constant frequency, pulse-width modulation (PWM) control
scheme for excellent stability and transient response. To ensure
the longest battery life in portable applications, the ADP2140 has
a power saving variable frequency mode to reduce switching fre-
quency under light loads.
The LDO is a low quiescent current, low dropout linear regulator
designed to operate in a split supply mode with VIN2 as low as
1.65 V. The low input voltage minimum allows the LDO to be
powered from the output of the buck regulator increasing effi-
ciency and reducing power dissipation. The ADP2140 runs from
input voltages of 2.3 V to 5.5 V allowing single Li+/Li− polymer
TYPICAL APPLICATION CIRCUITS
VIN1 = 3.6V
CIN +
100k10µF
10
PG
EN1
EN2
VOUT2 = 1.8V
COUT2 +
1µF
9
8
7
6
ADP2140
VIN1 PGND
PG SW
EN1 AGND
EN2 FB
VOUT2 VIN2
1
2
3
4
5
1µH VOUT = 1.2V
+ COUT
10µF
Figure 1. ADP2140 with LDO Connected to VIN1
VIN1 = 3.3V
CIN +
100k10µF
10
PG
EN1
EN2
VOUT2 = 1.2V
COUT2 +
1µF
9
8
7
6
ADP2140
VIN1 PGND
PG SW
EN1
AGND
EN2 FB
VOUT2 VIN2
1
2
3
4
5
1µH VOUT = 1.8V
+ COUT
10µF
Figure 2. ADP2140 with LDO Connected to Buck Output
cell, multiple alkaline/NiMH cell, PCMCIA, and other standard
power sources.
ADP2140 includes a power-good pin, soft start, and internal
compensation. Numerous power sequencing options are user-
selectable through two enable inputs. In autosequencing mode,
the highest voltage output enables on the rising edge of EN1.
During logic controlled shutdown, the input disconnects from
the output and draws less than 300 nA from the input source.
Other key features include: undervoltage lockout to prevent deep
battery discharge, soft start to prevent input current overshoot
at startup, and both short-circuit protection and thermal overload
protection circuits to prevent damage in adverse conditions.
When the ADP2140 is used with two 0603 capacitors, one 0402
capacitor, one 0402 resistor, and one 0805 chip inductor, the total
solution size is approximately 90 mm2 resulting in the smallest foot-
print solution to meet a variety of portable applications.
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
©2010 Analog Devices, Inc. All rights reserved.




ADP2140 pdf, 반도체, 판매, 대치품
ADP2140
www.DataSheet4U.com
Parameter
Output Noise
Symbol
OUTNOISE
Current Limit
Input Leakage Current
Start-Up Time1
Soft Start Time2
ADDITIONAL FUNCTIONS
Undervoltage Lockout
Input Voltage Rising
Input Voltage Falling
EN Input
EN1, EN2 Input Logic High
EN1, EN2 Input Logic Low
EN1, EN2 Input Leakage
ILIM
ILEAK-LDO
tSTART-UP
SSTIME
UVLO
UVLORISE
UVLOFALL
VIH
VIL
IEN-LKG
Shutdown Current
Thermal Shutdown
Threshold
Hysteresis
Power Good
Rising Threshold
Falling Threshold
Power-Good Hysteresis
Output Low
Leakage Current
Buck to LDO Delay
Power-Good Delay
ISHUT
TSSD
TSSD-HYS
PGRISE
PGFALL
PGHYS
VOL
IOH
tDELAY
tRESET
Test Conditions/Comments
VIN2 = VIN1 = 5 V, IOUT2 = 10 mA
10 Hz to 100 kHz, VOUT2 = 0.8 V
10 Hz to 100 kHz, VOUT2 = 1.2 V
10 Hz to 100 kHz, VOUT2 = 1.8 V
10 Hz to 100 kHz, VOUT2 = 2.5 V
10 Hz to 100 kHz, VOUT2 = 3.3 V
TJ = 25°C
EN2 = GND, VIN2 = 5.5 V and VOUT2 = 0 V
VOUT2 = 3.3 V, 300 mA load
VOUT2 = 3.3 V, 300 mA load
2.3 V ≤ VIN1 ≤ 5.5 V
2.3 V ≤ VIN1 ≤ 5.5 V
EN1, EN2 = VIN1 or GND
EN1, EN2 = VIN1 or GND
VIN1 = 5.5 V, EN1, EN2 = GND, TJ = −40°C to +85°C
TJ rising
ISINK = 4 mA
Power-good pin pull-up voltage = 5.5 V
PWM mode only
PWM mode only
Min Typ Max Unit
29 μV rms
40 μV rms
50 μV rms
66 μV rms
88 μV rms
360 500 760 mA
1 μA
70 μs
130 μs
2.23 2.3
2.05 2.16
V
V
1.0 V
0.27 V
0.05 μA
1 μA
0.3 1.2 μA
150 °C
20 °C
92 %VOUT
86 %VOUT
6 %VOUT
0.2 V
1 μA
5 ms
5 ms
1 Start-up time is defined as the time between the rising edge of ENx to VOUTx being at 10% of the VOUTx nominal value.
2 Soft start time is defined as the time between VOUTx being at 10% to VOUTx being at 90% of the VOUTx nominal value.
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 for output
voltages above 2.3 V.
RECOMMENDED SPECIFICATIONS: CAPACITORS AND INDUCTOR
Table 2.
Parameter
MINIMUM INPUT AND OUTPUT CAPACITANCE1
Buck
LDO
CAPACITOR ESR
Buck
LDO
MINIMUM INDUCTOR
Symbol
CMIN
CMIN
RESR
RESR
INDMIN
Test Conditions/Comments Min Typ Max Unit
TA = −40°C to +125°C
7.5 10
μF
0.7 1.0
μF
TA = −40°C to +125°C
Ω
0.001
0.01 Ω
0.001
0.7 1
μH
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 with any LDO.
Rev. 0 | Page 4 of 32

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ADP2140 전자부품, 판매, 대치품
ADP2140www.DataSheet4U.com
TYPICAL PERFORMANCE CHARACTERISTICS
BUCK OUTPUT
VIN1 = 4 V, VOUT = 1.8 V, IOUT = 10 mA, CIN = COUT = 10 μF, TA = 25°C, unless otherwise noted.
30 1.82
25 1.81
20 1.80
15 1.79
10
–40°C
5
–5°C
+25°C
+85°C
+125°C
0
2.3 2.8 3.3 3.8 4.3 4.8 5.3
INPUT VOLTAGE (V)
Figure 4. Quiescent Supply Current vs. Input Voltage, Different Temperatures
1.78
1.77
1.76
–40
LOAD CURRENT = 1mA
LOAD CURRENT = 10mA
LOAD CURRENT = 50mA
LOAD CURRENT = 100mA
LOAD CURRENT = 300mA
LOAD CURRENT = 600mA
–5 25 85
JUNCTION TEMPERATURE (°C)
125
Figure 7. Output Voltage vs. Temperature, VIN1 = 2.3 V, Different Loads
3.1
3.0
2.9
2.8
2.7
+25°C
2.6 –40°C
–5°C
+85°C
+125°C
2.5
2.3 2.8 3.3 3.8 4.3 4.8 5.3
INPUT VOLTAGE (V)
Figure 5. Switching Frequency vs. Input Voltage, Different Temperatures
1200
1150
1100
1050
2.3V
3.0V
4.0V
5.0V
5.5V
1000
950
900
850
800
750
700
–60 –40 –20 0
20 40 60 80 100 120 140
JUNCTION TEMPERATURE (°C)
Figure 8. Current Limit vs. Temperature, Different Input Voltages
3.10
5.5V
3.05
4.6V
3.1V
3.00
2.3V
2.95
2.90
2.85
2.80
2.75
2.70
2.65
2.60
–60 –40 –20 0
20 40 60 80 100 120 140
TEMPERATURE (°C)
Figure 6. Switching Frequency vs. Temperature, Different Input Voltages
140
120
100
80
60
40
–40°C
–5°C
20 +25°C
+85°C
0 +125°C
3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50
INPUT VOLTAGE (V)
Figure 9. PSM to PWM Mode Transition vs. Input Voltage, Different
Temperatures
Rev. 0 | Page 7 of 32

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