Datasheet

LTM4615
7
4615fb
For more information www.linear.com/LTM4615
Typical perForMance characTerisTics
Ripple Rejection Output Current Limit
Delay from Enable to Power Good
4615 G19
FREQUENCY (Hz)
100
70
60
50
40
30
20
10
0
100000
1000 10000 1000000 1E+07
RIPPLE REJECTION (dB)
V
BOOST3
= 5V
V
LDO_IN
= 1.5V
V
LDO_OUT
=1.2V
I
OUT
= 800mA
C
OUT
= 10µF
4615 G20
V
LDO_IN
(V)
1.0
I
LDO_OUT
(A)
2.5
3.5
1.5 2.0 3.0
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
CURRENT LIMIT
THERMAL LIMIT
V
LDO_OUT
= 0V
T
A
= 25°C
4615 G21
V
LDO_IN
(V)
1.0
DELAY (ms)
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
3.0
1.5
2.0
2.5
3.5
–40°C
25°C
85°C
V
LDO_OUT
= 0.8V
R
LDO_OUT
= 8Ω
Output Load Transient Response IN Supply Transient Response
4615 G22
I
LDO_OUT
1.5A
2mA
V
LDO_OUT
AC
20mV/DIV
50µs/DIV
V
LDO_OUT
= 1.5V
C
OUT
= 10µF
V
LDO_IN
= 1.7V
V
BOOST3
= 5V
4615 G23
V
LDO_IN
2V
1.5V
V
LDO_OUT
AC
10mV/DIV
10µs/DIV
V
LDO_OUT
= 1.2V
I
LDO_OUT
= 800mA
C
OUT
= 10µF
V
BOOST3
= 5V
T
A
= 25°C
BOOST3/OUT Start-Up
BOOST3 Ripple and Feedthrough to
V
LDO_OUT
4615 G24
EN3
BOOST3
V
LDO_OUT
HI
LO
200µs/DIV
T
A
= 25°C
R
LDO_OUT
= 1Ω
V
LDO_IN
= 1.7V
5V
1.5V
1V
0V
4615 G25
BOOST3
AC 20mV/DIV
V
LDO_OUT
AC 5mV/DIV
20µs/DIV
V
LDO_OUT
= 1.2V
V
LDO_IN
= 1.5V
I
LDO_OUT
= 1A
C
OUT
= 10µF
T
A
= 25°C