Analog Devices ADP1148-5 Manuale Utente
–2–
REV. A
ADP1148, ADP1148-3.3, ADP1148-5–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Conditions
2
Min
Typ
Max
Units
FEEDBACK VOLTAGE
ADP1148 Only
V
10
V
IN
= 9 V
1.21
1.25
1.29
V
FEEDBACK CURRENT
ADP1148 Only
I
10
0.2
1.0
µ
A
REGULATED OUTPUT VOLTAGE
V
OUT
V
IN
= 9 V
ADP1148-3.3
I
LOAD
= 700 mA
3.23
3.33
3.43
V
ADP1148-5
I
LOAD
= 700 mA
4.9
5.05
5.2
V
OUTPUT VOLTAGE LINE
T
A
= +25
°
C, V
IN
= 7 V to 12 V,
REGULATION
dV
OUT
I
LOAD
= 50 mA
–40
+40
mV
OUTPUT VOLTAGE LOAD
REGULATION
dV
OUT
ADP1148-3.3
5 mA < I
LOAD
< 2 A
40
65
mV
ADP1148-5
5 mA < I
LOAD
< 2 A
60
100
mV
SLEEP MODE OUTPUT RIPPLE
dV
OUT
I
LOAD
= 0 A
50
mV p-p
INPUT DC SUPPLY CURRENT
3
I
Q
T
A
= +25
°
C
Normal Mode
V
IN
= 4 V < V
IN
< 18 V
1.6
2.3
mA
Sleep Mode (ADP1148-3.3)
V
IN
= 4 V < V
IN
< 18 V
160
250
µ
A
Sleep Mode (ADP1148-5)
V
IN
= 4 V < V
IN
< 18 V
160
250
µ
A
Shutdown
V
SHUTDOWN
= 2.1 V,
10
20
µ
A
4 V < V
IN
< 15 V
CURRENT SENSE THRESHOLD
V
8
–V
7
V
9
= V
OUT
/4 + 25 mV (Forced),
VOLTAGE
4
V
7
= 5 V, T
A
= +25
°
C
25
mV
ADP1148 Only
V
9
= V
OUT
/4 mV – 25 mV (Forced),
V
7
= 5 V
130
150
170
mV
ADP1148-3.3
V
7
= V
OUT
+ 100 mV (Forced)
25
mV
V
7
= V
OUT
–
100 mV (Forced)
130
150
170
mV
ADP1148-5
V
7
= V
OUT
+ 100 mV (Forced
25
mV
V
7
= V
OUT
– 100 mV (Forced)
130
150
170
mV
SHUTDOWN PIN THRESHOLD
ADP1148-3.3, ADP1148-5
V
10
T
A
= +25
°
C
0.6
0.8
2.0
V
SHUTDOWN PIN INPUT CURRENT
I
10
0 V < V
SHUTDOWN
< 8 V, V
IN
= 18 V
1.2
5
µ
A
C
T
PIN DISCHARGE CURRENT
I
4
T
A
= +25
°
C, V
OUT
in Regulation,
V
7
= V
OUT
,
50
65
90
µ
A
V
OUT
= 0 V
2
10
µ
A
OFF-TIME
t
OFF
C
T
= 390 pF, I
LOAD
= 700 mA
4
5
6
µ
s
DRIVER OUTPUT TRANSITION
t
R
, t
F
C
L
= 3000 pF (Pins 1, 14)
TIMES
V
IN
= 6 V, T
A
= +25
°
C
100
200
ns
NOTES
1
All limits at temperature extremes are guaranteed via correlation using standard Quality Control methods. Specifications subject to change without notice.
2
T
J
is calculated from the ambient temperature T
A
and power dissipation P
D
according to the following formulas:
ADP1148AR, ADP1148AR-3.3, ADP1148AR-5:
T
J
= T
A
+ (P
D
×
110
°
C/W)
ADP1148AN, ADP1148AN-3.3, ADP1148AN-5:
T
J
= T
A
+ (P
D
×
70
°
C/W)
3
Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. The allowable operating frequency may be limited by power
dissipation at high input voltages.
4
The ADP1148 version is tested with external feedback resistors, setting the nominal output voltage to 3.3 V.
Specifications subject to change without notice.
(0
8C
≤
T
A
≤
+70
8C,
1
V
IN
= 10 V, V
SHUTDOWN
= 0 V, unless otherwise noted. See Figure 17.)