Table of Contents
Advertisement
TYPICAL PERFORMANCE CHARACTERISTICS
Single Channel Load Transient
Response 25% (12.5A) Load Step,
10A/µs 12V
to 1V
IN
V
OUT
20mV/DIV
AC-COUPLED
I
OUT
5A/DIV
50µs/DIV
FIGURE 46 CIRCUIT
V
=SV
=12V, V
=1V, f
IN
IN
OUT
C
= 3x470µF POSCAP + 3x100µF CERAMIC CAP
OUT
CCOMPb=47pF , CCOMPa=2200pF
R
=6, gm=4.36
TH
Single Channel Load Transient
Response 25% (12.5A) Load Step,
10A/µs 12V
to 1.8V
IN
V
OUT
20mV/DIV
AC-COUPLED
I
OUT
5A/DIV
50µs/DIV
FIGURE 46 CIRCUIT
V
=SV
=12V, V
=1.8V, f
IN
IN
OUT
C
= 3x470µF POSCAP + 3x100µF CERAMIC CAP
OUT
CCOMPb=47pF , CCOMPa=2200pF
R
=6, gm=4.36
TH
Single Channel Load Transient
Response 25% (12.5A) Load Step,
10A/µs 12V
OUT
V
OUT
20mV/DIV
AC-COUPLED
I
OUT
5A/DIV
4700 G05
FIGURE 46 CIRCUIT
=350kHz
S
V
IN
C
OUT
CCOMPb=47pF , CCOMPa=2200pF
R
TH
Dual Output Concurrent Rail,
Start-Up/Shutdown
OUT
V
, 1.8V
OUT1
500mV/DIV
V
, 1V
OUT0
500mV/DIV
I
, 18A
OUT0
5A/DIV
RUN0, RUN1
5V/DIV
4700 G08
FIGURE 46 CIRCUIT AT 12V
=500kHz
NO LOAD ON V
S
TON_RISE
TOFF_DELAY
TOFF_FALL
ON_OFF_CONFIG
For more information
T
= 25°C, 12V
A
to 1.2V
IN
OUT
50µs/DIV
4700 G06
=SV
=12V, V
=1.2V, f
=425kHz
IN
OUT
S
= 3x470µF POSCAP + 3x100µF CERAMIC CAP
=6, gm=4.36
2ms/DIV
4700 G09
, 18A LOAD ON V
IN
OUT1
= 3ms
TON_RISE
= 5.297ms
0
1
= 2.43ms
TOFF_DELAY
= 0ms
0
1
= 3ms
TOFF_FALL
= 5.328ms
0
1
= 0x1F
n
www.analog.com
LTM4700
to 1V
, unless otherwise noted.
IN
OUT
Single Channel Load Transient
Response 25% (12.5A) Load Step,
10A/µs 12V
to 1.5V
IN
V
OUT
20mV/DIV
AC-COUPLED
I
OUT
5A/DIV
50µs/DIV
FIGURE 46 CIRCUIT
V
=SV
=12V, V
=1.5V, f
IN
IN
OUT
C
= 3x470µF POSCAP + 3x100µF CERAMIC CAP
OUT
CCOMPb=47pF , CCOMPa=2200pF
R
=6, gm=4.36
TH
Dual Output Concurrent Rail
Start-Up/Shutdown Pre-Bias
V
, 1.8V
OUT1
500mV/DIV
V
, 1V
OUT0
500mV/DIV
I
, 18A
OUT0
10A/DIV
RUN0, RUN1
5V/DIV
2ms/DIV
,
FIGURE 46 CIRCUIT AT 12V
OUT0
NO LOAD ON V
, V
OUT1
OUT1
THROUGH A DIODE (PRE-BIASED DISCONNECTED
AT SHUT-DOWN)
TON_RISE
= 3ms
0
TOFF_DELAY
= 2.43ms
0
TOFF_FALL
= 3ms
0
ON_OFF_CONFIG
= 0x1F
n
OUT
4678 G07
=425kHz
S
4700 G10
, 25A LOAD ON V
,
IN
OUT0
PRE_BIASED to 500mV
TON_RISE
= 5.297ms
1
TOFF_DELAY
= 0ms
1
TOFF_FALL
= 5.328ms
1
Rev. B
13
Advertisement
Table of Contents
