ltm4615 Linear Technology Corporation, ltm4615 Datasheet - Page 7

• Manufacturer Part Number: ltm4615
• Description: Triple Output, Low Voltage Dc/dc ?module Regulator
• Manufacturer: Linear Technology Corporation

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