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ADP1108AN-5 데이터 시트보기 (PDF) - Analog Devices

부품명ADP1108AN-5 ADI
Analog Devices ADI
상세내역Micropower DC-DC Converter Adjustable and Fixed 3.3 V, 5 V, 12 V
ADP1108AN-5 Datasheet PDF : 12 Pages
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ADP1108–SPECIFICATIONS (0؇C to +70؇C, VIN = 3.0 V unless otherwise noted)
Parameter
Symbol Conditions
Min Typ Max Units
QUIESCENT CURRENT
IQ
QUIESCENT CURRENT,
IQ
BOOST MODE CONFIGURATION
Switch Off
No Load, TA = +25°C
ADP1108-3.3
ADP1108-5
ADP1108-12
90
150 µA
90
µA
90
µA
90
µA
INPUT VOLTAGE
VIN
Step-Up Mode
Step-Down Mode
2.0
12.6 V
30
V
COMPARATOR TRIP POINT VOLTAGE
OUTPUT SENSE VOLTAGE
VOUT
ADP11081
ADP1108-3.32
ADP1108-52
ADP1108-122
1.20 1.245 1.30 V
3.13 3.3 3.46 V
4.75 5.00 5.25 V
11.4 12.0 12.6 V
COMPARATOR HYSTERESIS
ADP1108
5
12
mV
OUTPUT HYSTERESIS
ADP1108-3.3
ADP1108-5
ADP1108-12
13
30
mV
20
55
mV
50
100 mV
OSCILLATOR FREQUENCY
14
19
25
kHz
DUTY CYCLE
Full Load
55
70
78
%
SWITCH ON TIME
FEEDBACK PIN BIAS CURRENT
tON
ILIM Tied to VIN
VFB = 0 V
25
36
48
µs
25
200 nA
SET PIN BIAS CURRENT
GAIN BLOCK OUTPUT LOW
REFERENCE LINE REGULATION
SWSAT VOLTAGE, STEP-UP MODE
SWSAT VOLTAGE, SAT
STEP-DOWN MODE
GAIN BLOCK GAIN
CURRENT LIMIT
CURRENT LIMIT TEMPERATURE
COEFFICIENT
VOL
VSAT
AV
VSET = VREF
60
130 nA
ISINK = 100 µA, VSET = 1.00 V
0.15 0.4 V
2.0 V VIN 5 V
5 V VIN 30 V
0.2 0.4 %/V
0.02 0.075 %/V
VIN = 3.0 V, ISW = 650 mA
VIN = 5.0 V, ISW = 1 A,
TA = +25°C
0.5 0.75 V
0.8 1.00 V
V
VIN = 12 V, ISW = 650 mA,
TA = +25°C
1.1 1.5 V
1.7 V
RL = 100K3
400 1000
V/V
220 from ILIM to VIN,
TA = +25°C
500
mA
–0.3
%/°C
SWITCH OFF LEAKAGE CURRENT
Measured at SW1 Pin,
TA = +25°C
1
10
µA
MAXIMUM EXCURSION BELOW GND VSW2
1SW1 10 µA, Switch Off
TA = +25°C
–400 –350 mV
NOTES
1This specification guarantees that both the high and low trip points of the comparator fall within the 1.20 V to 1.30 V range.
2The output voltage waveform will exhibit a sawtooth shape due to the comparator hysteresis. The output voltage on the fixed output versions will always be within the
specified range.
3100 kresistor connected between a 5 V source and the AO pin.
All limits at temperature extremes are guaranteed via correlation using standard Quality Control methods.
Specifications subject to change without notice.
–2–
REV. 0
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GENERAL DESCRIPTION
The ADP1108 is a highly versatile micropower switch-mode dc-dc converter that operates from an input voltage supply as low as 2.0 V and typically starts up from 1.8 V. The ADP1108 can be programmed into a step-up or step-down dc-to-dc converter with only three external components. The fixed outputs are 3.3 V, 5 V and 12 V. An adjustable version is also available. In step-up mode, supply voltage range is 2.0 V to 12 V, and 30 V in step-down mode. The ADP1108 can deliver 150 mA at 5 V from a 2 AA cell input and 300 mA at 5 V from a 9 V input in step down mode. Switch current limit can be programmed with a single resistor.

FEATURES
Operates at Supply Voltages From 2.0 V to 30 V
Consumes Only 110 mA Supply Current
Step-Up or Step-Down Mode Operation
Minimum External Components Required
Low Battery Detector Comparator On-Chip
User-Adjustable Current Limit
Internal 1 A Power Switch
Fixed or Adjustable Output Voltage Versions
8-Pin DIP or SO-8 Package

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