Datasheet

LT4180
4
4180fb
For more information www.linear.com/4180
Typical perForMance characTerisTics
I
DRAIN
vs V
DRAIN
Normal Timing
Spread Spectrum Timing
V
LOAD
vs V
WIRE
Load Step in
12V Linear Application
Load Step in Buck Application
V
REF
vs Temperature INTV
CC
vs Temperature
Oscillator Frequency
vs Temperature
V
WIRING
(V)
0
V
LOAD
(V)
4.97
4.98
4.99
4.96
4.95
0.5 1.51 2 2.5 3
4.92
4.91
4.94
5.00
4.93
4180 G07
5ms/DIV
500mA
200mA
200mA TO 500mA LOAD TRANSIENT
100µF LOAD CAP
V
SENSE
2V/DIV
V
LOAD
2V/DIV
I
LOAD
200mA/DIV
4180 G08
R
WIRE
= 8Ω
5µs/DIV
TRIGGERED ON CHOLD1
500mV/DIV
C
HOLD1
WITH 15k
PULL-DOWN
2V/DIV
OSC
4180 G05
1µs/DIV
TRIGGERED ON OSC
500mV/DIV
C
HOLD1
WITH 15k
PULL-DOWN
2V/DIV
OSC
4180 G06
10ms/DIV
V
SENSE
2V/DIV
V
LOAD
2V/DIV
4180 G09
I
LOAD
500mA/DIV
500mA
1.5A
R
WIRE
= 2.5Ω
500mA TO 1.5A LOAD TRANSIENT
470µF LOAD CAP
TEMPERATURE (°C)
–55
V
REF
(V)
1.2205
1.2210
1.2215
105
1.2200
1.2195
1.2190
–35 –15 5
25 45
65 85
125
4108 G01
TEMPERATURE (°C)
–55
INTV
CC
(V)
3.150
3.160
3.155
3.165
105
3.145
3.140
3.135
–35 –15 5
25 45
65 85
125
4108 G02
TEMPERATURE (°C)
–55
FREQUENCY (kHz)
203.0
203.5
204.0
105
202.5
202.0
201.5
–35 –15 5
25 45
65 85
125
4108 G03
R
OSC
= 20k
C
OSC
= 1nF
V
DRAIN
(V)
0
I
DRAIN
(mA)
8
10
12
0.7
6
4
0.2 0.4
0.1 0.9
0.3 0.5
0.8
0.6 1
2
0
14
4180 G04