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ADP2109 데이터시트 PDF




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부품번호 ADP2109 기능
기능 Step-Down Converter
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ADP2109 데이터시트, 핀배열, 회로
Data Sheet
Compact 600 mA, 3 MHz, Step-Down
Converter with Output Discharge
ADP2109
FEATURES
Peak efficiency: 95%
Discharge switch function
Fixed frequency operation: 3 MHz
Typical quiescent current: 18 μA
Maximum load current: 600 mA
Input voltage: 2.3 V to 5.5 V
Uses tiny multilayer inductors and capacitors
Current mode architecture for fast load and line transient
response
100% duty-cycle low dropout mode
Internal synchronous rectifier
Internal compensation
Internal soft start
Current overload protection
Thermal shutdown protection
Shutdown supply current: 0.2 μA
5-ball WLCSP
Supported by ADIsimPower™ design tool
APPLICATIONS
PDAs and palmtop computers
Wireless handsets
Digital audio, portable media players
Digital cameras, GPS navigation units
GENERAL DESCRIPTION
The ADP2109 is a high efficiency, low quiescent current step-
down dc-to-dc converter with an internal discharge switch that
allows automatic discharge of the output capacitor in an ultra-
small 5-ball WLCSP package.
The total solution requires only three tiny external components.
It uses a proprietary high speed current mode and constant
frequency pulse-width modulation (PWM) control scheme for
excellent stability, and transient response. To ensure the longest
battery life in portable applications, the ADP2109 has a power
save mode that reduces the switching frequency under light
load conditions.
The ADP2109 runs on input voltages of 2.3 V to 5.5 V, which
allow for single lithium or lithium polymer cell, multiple alkaline
or NiMH cells, PCMCIA, USB, and other standard power
sources. The maximum load current of 600 mA is achievable
across the input voltage range.
The ADP2109 is available in fixed output voltages of 1.8 V, 1.5 V,
1.2 V, and 1.0 V. All versions include an internal power switch
and synchronous rectifier for minimal external part count and
high efficiency. The ADP2109 has an internal soft start and internal
compensation. During logic-controlled shutdown, the input is
disconnected from the output and the ADP2109 draws less than
1 μA from the input source.
Other key features include undervoltage lockout to prevent deep
battery discharge and soft start to prevent input current overshoot
at startup. The ADP2109 is available in a 5-ball WLCSP.
A similar converter, the ADP2108, provides the same features
and operations as the ADP2109 without the discharge switch
and is available in both WLCSP and TSOT packages with
additional output voltages.
TYPICAL APPLICATIONS CIRCUIT
2.3V TO 5.5V
4.7µF
VIN
1µH 1.0V TO 1.8V
SW
10µF
ADP2109
ON
OFF
EN FB
GND
Figure 1.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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 ©2009–2012 Analog Devices, Inc. All rights reserved.
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ADP2109 pdf, 반도체, 판매, 대치품
ADP2109
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
VIN, EN
FB, SW to GND
Operating Ambient Temperature Range
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature Range
Soldering Conditions
Rating
−0.4 V to +6.5 V
−1.0 V to (VIN + 0.2 V)
−40°C to +85°C
−40°C to +125°C
−65°C to +150°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.
Absolute maximum ratings apply individually only, not in
combination. Unless otherwise specified, all other voltages are
referenced to GND.
Data Sheet
The ADP2109 can be damaged when the junction temperature
limits are exceeded. Monitoring ambient temperature does not
guarantee that the junction temperature (TJ) is within the specified
temperature limits. In applications with high power dissipation
and poor thermal resistance, the maximum ambient tempera-
ture may have to be derated. In applications with moderate
power dissipation and low PCB thermal resistance, the max-
imum ambient temperature can exceed the maximum limit
as long as TJ is within specification limits. TJ of the device is
dependent on the ambient temperature (TA) of the device,
the power dissipation (PD) of the device, and the junction-to-
ambient thermal resistance (θJA) of the package. Maximum TJ
is calculated from TA and PD using the following formula:
TJ = TA + (PD × θJA)
THERMAL RESISTANCE
θJA is specified for a device mounted on a JEDEC 2S2P PCB.
Table 4. Thermal Resistance
Package Type
5-Ball WLCSP
θJA
105
Unit
°C/W
ESD CAUTION
Rev. B | Page 4 of 16
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ADP2109 전자부품, 판매, 대치품
Data Sheet
1.825
1.815
1.805
1.795
VIN = 2.7V
VIN = 3.6V
VIN = 4.5V
VIN = 5.5V
1.785
1.775
0
0.1 0.2 0.3 0.4 0.5
OUTPUT CURRENT (A)
Figure 9. Load Regulation, VOUT = 1.8 V
0.6
1.025
1.020
1.015
1.010
1.005
1.000
0.995
0.990
0.985
0
VIN = 2.7V
VIN = 3.6V
VIN = 4.5V
VIN = 5.5V
0.1 0.2 0.3 0.4 0.5
OUTPUT CURRENT (A)
Figure 10. Load Regulation, VOUT = 1.0 V
100
90
80
70
60
50
40
30
20
10
0
0.001
VIN = 2.7V
VIN = 3.6V
VIN = 4.5V
VIN = 5.5V
0.01
0.1
OUTPUT CURRENT (A)
Figure 11. Efficiency, VOUT = 1.8 V
0.6
1
ADP2109
100
90
80
70
60
50
40
30
20
10
0
0.001
VIN = 2.7V
VIN = 3.6V
VIN = 4.5V
VIN = 5.5V
0.01 0.1
OUTPUT CURRENT (A)
Figure 12. Efficiency, VOUT = 1.0 V
1
VIN
3
SW
4
VOUT
1
CH1 50mV
CH3 1V
CH4 2V
M 40µs
T 10.80%
A CH3 3.26V
Figure 13. Line Transient, VOUT = 1.8 V, Power Save Mode, ILOAD = 20 mA
VIN
SW
3
4
VOUT
1
20mV
CH3 1V
CH4 2V
M 40µs
10.80%
A CH3 3.26V
Figure 14. Line Transient, VOUT = 1.8 V, PWM, ILOAD =100 mA
Rev. B | Page 7 of 16
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