ADP1108 Analog Devices, ADP1108 Datasheet - Page 2

• Manufacturer Part Number: ADP1108
• Description: Micropower DC-DC Converter Adjustable and Fixed 3.3 V/ 5 V/ 12 V
• Manufacturer: Analog Devices

Parameter
QUIESCENT CURRENT
QUIESCENT CURRENT,
INPUT VOLTAGE
COMPARATOR TRIP POINT VOLTAGE
OUTPUT SENSE VOLTAGE
COMPARATOR HYSTERESIS
OUTPUT HYSTERESIS
OSCILLATOR FREQUENCY
DUTY CYCLE
SWITCH ON TIME
FEEDBACK PIN BIAS CURRENT
SET PIN BIAS CURRENT
GAIN BLOCK OUTPUT LOW
REFERENCE LINE REGULATION
SW
SW
STEP-DOWN MODE
GAIN BLOCK GAIN
CURRENT LIMIT
CURRENT LIMIT TEMPERATURE
SWITCH OFF LEAKAGE CURRENT
MAXIMUM EXCURSION BELOW GND
NOTES
1
2
3
All limits at temperature extremes are guaranteed via correlation using standard Quality Control methods.
Specifications subject to change without notice.
ADP1108–SPECIFICATIONS
This specification guarantees that both the high and low trip points of the comparator fall within the 1.20 V to 1.30 V range.
The 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.
100 k resistor connected between a 5 V source and the AO pin.
COEFFICIENT
BOOST MODE CONFIGURATION
SAT
SAT
VOLTAGE, STEP-UP MODE
VOLTAGE,
SAT
Symbol
I
I
V
V
t
V
V
A
V
Q
Q
ON
IN
OUT
OL
SAT
V
SW2
(0 C to +70 C, V
Switch Off
No Load, T
Step-Up Mode
Step-Down Mode
ADP1108
ADP1108-3.3
ADP1108-5
ADP1108-12
ADP1108-5
ADP1108-12
Full Load
I
I
2.0 V
5 V
V
V
T
V
T
R
220
T
Measured at SW1 Pin,
T
1
T
Conditions
ADP1108
ADP1108-3.3
VFB = 0 V
V
LIM
SINK
SW1
SET
IN
IN
A
IN
A
L
A
A
A
ADP1108-3.3
ADP1108-5
ADP1108-12
–2–
= 100K
= +25 C
= +25 C
= +25 C
= +25 C
= +25 C
= 3.0 V, I
= 5.0 V, I
= 12 V, I
Tied to V
= V
= 100 A, V
V
from I
10 A, Switch Off
IN
V
IN
REF
IN
1
= 3.0 V unless otherwise noted)
3
A
30 V
2
SW
LIM
2
SW
SW
= +25 C
5 V
2
IN
= 650 mA,
= 650 mA
= 1 A,
to V
SET
IN
= 1.00 V
,
2.0
1.20
3.13
4.75
11.4
14
55
25
400
Min
Typ
90
90
90
90
1.245
3.3
5.00
12.0
5
13
20
50
19
70
36
25
60
0.15
0.2
0.02
0.5
0.8
1.1
1000
500
–0.3
1
–400
Max
150
12.6
30
1.30
3.46
5.25
12.6
12
30
55
100
25
78
48
200
130
0.4
0.4
0.075
0.75
1.00
1.5
1.7
10
–350
REV. 0
Units
V
V
V
V
V
V
mV
mV
mV
mV
kHz
%
nA
nA
V
%/V
%/V
V
V
V
V
V
V/V
mA
%/ C
mV
A
A
A
A
s
A