Datasheet

LTM4615
6
4615fb
For more information www.linear.com/LTM4615
Typical perForMance characTerisTics
Start-Up Start-Up
V
FB
vs Temperature
Current Limit
Short-Circuit Protection
1.5V Short, No Load
V
FB3
vs Temperature Dropout Voltage vs Input Voltage Ripple Rejection
V
OUT
1V/DIV
I
IN
1A/DIV
V
IN
= 5V
V
OUT
= 2.5V
C
OUT
= 100µF
NO LOAD
(0.01µF SOFT-START CAPACITOR)
200µs/DIV
4615 G10
V
OUT
1V/DIV
I
IN
1A/DIV
V
IN
= 5V
V
OUT
= 2.5V
C
OUT
= 100µF
4A LOAD
(0.01µF SOFT-START CAPACITOR)
200µs/DIV
4615 G11
TEMPERATURE (°C)
–50
794
V
FB
(mV)
796
798
800
802
804
806
–25 500 25 12510075
4615 G12
OUTPUT CURRENT (A)
3
V
OUT
(V)
0.6
0.8
1.0
6
8
4615 G13
0.4
0.2
0
4 5 7
1.2
1.4
1.6
V
IN
= 5V
V
IN
= 3.3V
V
IN
= 2.5V
V
OUT
= 1.5V
Short-Circuit Protection
1.5V Short, 4A Load
V
OUT
0.5V/DIV
I
IN
1A/DIV
100µs/DIV
4615 G15
4615 G16
TEMPERATURE (°C)
–50 –25
404
403
402
401
400
399
398
397
396
75
1000 5025 125
FB3 VOLTAGE (mV)
1mA
1.5A
V
BOOST3
= 5V
V
LDO_IN
= 1.5V
V
LDO_OUT
=1.2V
4615 G17
V
LDO_IN
(V)
1.2
200
180
160
140
120
100
80
60
40
20
0
2.2
1.4 1.6 1.8 2.42.0 2.6
DROPOUT (mV)
–40°C
25°C
85°C
125°C
V
FB3
= 0.38V
I
LDO_OUT
=1.5A
4615 G18
V
LDO_IN
(V)
1.2
RIPPLE REJECTION (dB)
60
50
40
30
20
10
0
1.8 2.2
1.4 1.6
2.0 2.4 2.6
1MHz
100kHz
10kHz
V
BOOST3
= 5V
V
LDO_OUT
=1.2V
I
OUT
= 800mA
C
OUT
= 10µF
VLDO
V
OUT
0.5V/DIV
I
IN
1A/DIV
20µs/DIV
4615 G14