LTC1705 Linear Technology, LTC1705 Datasheet - Page 5

• Manufacturer Part Number: LTC1705
• Description: Dual 550kHz Synchronous Switching Regulator Controller
• Manufacturer: Linear Technology

TYPICAL PERFOR A CE CHARACTERISTICS
2.0
1.5
1.0
0.5
100
–0.5
–1.0
–1.5
–2.0
–2.5
0
90
80
70
60
50
0.5
0
0
–150
V
0
OUTC
V
I/O Supply Efficiency
T
V
QBC = 2 FDS6670A,
R
C
OUTCLK
A
V
CORE DISABLED, QTIO = QBIO = NDS8926
OUT
IMAXC
RUNSS
T
IN
= 25 C, V
A
–125
= 5V, V
= 1.6V,
4
= 25 C
vs Load Current
0.5
= 24.9k,
= 0.01 F
LOAD CURRENT (A)
Load Regulation
OUT
IN
–100
= 5V,
8
I
1
= 1.5V, T
OUTCLK
I
LOAD
–75
(A)
12
(mA)
1.5
A
= 25 C,
–50
W
16
2
–25
1705 G10
1705 G07
1705 G13
U
20
2.5
0
0.02
0
–0.02
–0.04
–0.06
–0.08
–0.10
V
2.55
2.54
2.53
2.52
2.51
2.50
2.49
2.48
2.47
2.46
2.45
0A TO 10A
OUT
AC 50mV/
5A/DIV
–50
= 1.6V
LOAD
V
DIV
OUTCLK
V
500
450
400
350
300
250
200
150
100
INCLK
–25
V
OUTC
–50
V
Temperature
= 3.3V
OUTCLK
vs Temperature
I
0
TEMPERATURE ( C)
OUTCLK
–25
0A To 10A Load Step
25
Dropout Voltage vs
= –150mA
0
TEMPERATURE ( C)
5ms/DIV
50
25
75
50
100
1705 G11
75
125
1705 G08
100
1705 G14
–0.5
–1.0
–1.5
–2.0
–2.5
125
2.5
2.0
1.5
1.0
0.5
0
3
V
OUTCLK
–150
–190
–230
–270
–310
–350
T
A
24
22
20
18
16
14
12
10
= 25 C
3.5
–50
–50
Current Limit Threshold vs
Temperature
V
Temperature
V
R
OUTCLK
Line Regulation
IN
IMAXC
V
–25
INCLK
–25
= 5V, V
4
= 24.9k, QTC = QBC = 2 FDS6670A
V
= 3.3V
INCLK
Short-Circuit Current vs
OUT
0
TEMPERATURE ( C)
0
4.5
TEMPERATURE ( C)
= 1.6V, V
(V)
25
25
LTC1705
5
50
50
OUT
5.5
= –1%,
75
1705 G12
75
6
100
100
0.10
0.08
0.06
0.04
0.02
0
–0.02
–0.04
–0.06
–0.08
–0.10
1705 G09
1705 G15
5
125
125