LTC1704 Linear Technology, LTC1704 Datasheet - Page 4

• Manufacturer Part Number: LTC1704
• Description: 550kHz Synchronous Switching Regulator Controller Plus Linear Regulator Controller
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
LTC1704/LTC1704B
4
V
(Burst Mode Operation)
CH1: V
CH2: 0.5A to 5.5A LOAD, 5A DIV
OUTSW
OUTSW
0.5A to 5.5A Load Step
= 1.8V, AC 50mV/DIV
0.812
0.808
0.788
0.804
0.800
0.796
0.792
–0.6
–2.4
–3.0
–3.6
–1.2
–1.8
0.6
100 s/DIV
0
–50
0
V
V
V
FB
OUTSW
CC
–25
vs Temperature
= 5V
3
Load Regulation
0
W
TEMPERATURE ( C)
6
25
I
LOAD
1704 G05
U
50
(A)
9
T
V
75
A
OUTSW
= 25 C
12
100
= 1.8V
V
CH1: V
CH2: 5A to 10A LOAD, 5A DIV
1704 G03
1704 G01
OUTSW
125
15
OUTSW
0.03
0
– 0.03
–0.07
–0.10
–0.17
–0.20
–0.13
5A to 10A Load Step
= 1.8V, AC 50mV/DIV
50 s/DIV
–0.16
–0.32
–0.48
–0.64
–0.80
0.80
0.64
0.48
0.32
0.16
24
22
18
16
14
10
20
12
0
–50
V
3
Switcher Current Limit Threshold
vs Temperature
T
FB
A
= 25 C
–25
Line Regulation
1704 G06
3.5
0
TEMPERATURE ( C)
4
25
V
CC
4.5
V
V
R
QT = QB = 2xFDS6670A
IN
OUTSW
V
IMAX
(V)
V
at 1A Load
CH1: V
CH2: V
50
OUTSW
= 5V
OUTSW
= 13.7k
5
= 1.8V
OUTSW
TG
75
= –1%
, 5V DIV
Burst Mode Operation
= 1.8V, AC 20mV/DIV
5.5
100
1704 G08
1704 G02
20 s/DIV
125
6
0.10
0.08
0.06
0.04
0.02
0
–0.02
–0.04
–0.06
–0.08
–0.10
1704 G07
1704bfa