LTM4600
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the –40°C to 85°C
temperature range, otherwise specifications are at TA = 25°C, VIN = 12V. Per typical application (front page) configuration.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I
Input Supply Current
V
IN
V
IN
V
IN
= 12V, V
= 12V, V
= 1.5V, I
= 3.3V, I
= 10A
= 10A
1.52
3.13
3.64
A
A
A
S(VIN)
OUT
OUT
OUT
OUT
= 5V, V
= 1.5V, I
= 10A
OUT
OUT
Output Specifications
I
Output Continuous Current Range
V
= 12V, V = 1.5V
OUT
0
10
A
OUTDC
IN
(See Output Current Derating Curves for
Different V , V
and T )
A
IN OUT
l
l
ΔV
ΔV
Line Regulation Accuracy
V
V
= 1.5V, I = 0A, FCB = 0V,
OUT
0.15
0.3
%
OUT(LINE)
OUT
IN
= 4.5V to 20V
V
OUT
OUT(LOAD)
Load Regulation Accuracy
V
OUT
= 1.5V, I
= 5V
= 0A to 10A, FCB = 0V
OUT
V
V
1
1.5
%
%
IN
IN
V
OUT
= 12V (Notes 3, 4)
V
Output Ripple Voltage
Output Ripple Voltage Frequency
Turn-On Time
V
V
V
= 12V, V
= 1.5V, I
= 0A, FCB = 0V
10
15
mV
P-P
OUT(AC)
IN
OUT
OUT
fs
= 1.5V, I
= 5A, FCB = 0V
= 1A
850
kHz
OUT
OUT
OUT
t
= 1.5V, I
IN
IN
START
OUT
V
= 12V
= 5V
0.5
0.7
ms
ms
V
ΔV
Voltage Drop for Dynamic Load Step
V
C
= 1.5V, Load Step: 0A/μs to 5A/μs
= 3 • 22μF 6.3V, 470μF 4V POSCAP,
36
mV
OUTLS
OUT
OUT
See Table 2
t
I
Settling Time for Dynamic Load Step
Output Current Limit
Load: 10% to 90% to 10% of Full Load
25
μs
SETTLE
Output Voltage in Foldback
OUTPK
V
IN
V
IN
= 12V, V
= 1.5V
OUT
14
14
A
A
= 5V, V
= 1.5V
OUT
Control Stage
l
V
Voltage at V
Pin
I
= 0A, V = 1.5V
OUT
0.591
0.594
0.6
0.6
0.609
0.606
V
V
OSET
OSET
OUT
V
RUN ON/OFF Threshold
0.8
–0.5
0.8
1.5
–1.2
1.8
2
–3
3
V
μA
RUN/SS
I
I
Soft-Start Charging Current
Soft-Start Discharging Current
V
V
= 0V
= 4V
RUN(C)/SS
RUN(D)/SS
RUN/SS
μA
RUN/SS
V
– SV
EXTV = 0V, FCB = 0V
100
16
mV
mA
IN
IN
CC
I
Current into EXTV Pin
EXTV = 5V, FCB = 0V, V
= 1.5V,
EXTVCC
CC
CC
= 0A
OUT
I
OUT
R
Resistor Between V
and V Pins
OSET
100
0.6
–1
kΩ
V
FBHI
OUT
V
FCB
Forced Continuous Threshold
0.57
0.63
–2
I
Forced Continuous Pin Current
V
= 0.6V
μA
FCB
FCB
PGOOD Output
ΔV
ΔV
ΔV
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
V
V
V
Rising
7.5
10
–10
2
12.5
%
%
%
V
OSETH
OSET
Falling
–7.5
–12.5
OSETL
OSET
Returning
OSET(HYS)
OSET
V
PGL
PGOOD Low Voltage
I
= 5mA
0.15
0.4
PGOOD
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTM4600I is guaranteed over the
–40°C to 85°C temperature range.
Note 3: Test assumes current derating versus temperature.
Note 4: Guaranteed by correlation.
Note 2: The LTM4600E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
4600fc
3