Datasheet

LTC3876
8
3876f
TYPICAL PERFORMANCE CHARACTERISTICS
CLKOUT/Switching Frequency
vs Input Voltage
CLKOUT/Switching Frequency
vs Load Current
CLKOUT/Switching Frequency
vs Temperature
VTTR Load Regulation
VDDQ = 2.5V
VTTR Load Regulation
VDDQ = 1.5V
VTTR Load Regulation
VDDQ = 1V
Output Regulation vs Input Voltage
VDDQ Channel 1
Output Regulation vs Load Current
VDDQ Channel 1
Output Regulation vs Temperature
VDDQ Channel 1
V
IN
(V)
0
NORMALIZED ∆V
OUT
(%)
0
0.1
0.2
15 25 40
3876 G19
–0.1
–0.2
510
20
30 35
V
OUT
= 1.5V
I
LOAD
= 5A
V
OUT
NORMALIZED AT V
IN
= 15V
I
LOAD
(A)
0
NORMALIZED ∆V
OUT
(%)
0
0.1
0.2
46 10
3876 G20
–0.1
–0.2
28
V
IN
= 15V
V
OUT
= 1.5V
V
OUT
NORMALIZED AT I
LOAD
= 4A
TEMPERATURE (°C)
–50
NORMALIZED ∆V
OUT
(%)
–0.2
–0.4
0.2
0.4
0.6
0 25 50 75 100 150
3876 G21
0
–0.6
–25 125
V
IN
= 15V
V
OUT
= 1.5V
I
LOAD
= 0A
V
OUT
NORMALIZED AT T
A
= 25°C
V
IN
(V)
0
NORMALIZED ∆f (%)
–1
1
2
10 15 20 25 30 40
3876 G22
0
–2
535
V
OUT
= 1.6V
I
LOAD
= 5A
f = 200kHz
FREQUENCY NORMALIZED AT V
IN
= 15V
I
LOAD
(A)
0
NORMALIZED ∆f (%)
–1
1
2
46 10
3876 G23
0
–2
28
V
IN
= 15V
V
OUT
= 1.5V
f = 200kHz
FREQUENCY NORMALIZED AT I
LOAD
= 4A
TEMPERATURE (°C)
–50
NORMALIZED ∆f (%)
–1
1
2
0 25 50 75 100 150
3876 G24
0
–2
–25 125
V
IN
= 15V, V
OUT
= 1.5V
I
LOAD
= 0A, f = 200kHz
FREQUENCY NORMALIZED AT T
A
= 25°C
I
VTTR
(mA)
–50
VTTR(I
VTTR
)/VDDQ (V/V)
0.520
–25 0 50
3876 G24
0.505
0.500
0.495
0.490
0.485
0.515
0.510
0.480
25
–40°C
25°C
85°C
125°C
V
IN
= 15V
f = 400kHz
I
VTTR
(mA)
–50
VTTR(I
VTTR
)/VDDQ (V/V)
0.520
–25 0 50
3876 G26
0.505
0.500
0.495
0.490
0.485
0.515
0.510
0.480
25
–40°C
25°C
85°C
125°C
V
IN
= 15V
f = 400kHz
I
VTTR
(mA)
–50
VTTR(I
VTTR
)/VDDQ (V/V)
0.520
–25 0 50
3876 G27
0.505
0.500
0.495
0.490
0.485
0.515
0.510
0.480
25
–40°C
25°C
85°C
125°C
V
IN
= 15V
f = 400kHz