Linear Technology Analog Devices LTM4636-1, Manual, Page: 3 / 36

LTM4636
3
4636f
For more information www.linear.com/LTM4636
elecTrical characTerisTics
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2), otherwise specifications are at T
A
= 25°C. V
IN
= 12V, per the Typical Application in Figure 20.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input DC Voltage V
IN
≤ 5.5V, Tie V
IN
, INTV
CC
and PV
CC
Together, Tie RUNP
to GND
l
4.7 15 V
V
OUT
V
OUT
Range
l
0.6 3.3 V
V
OUT(DC)
DC Output Voltage, Total
Variation with Line and Load
C
IN
= 22µF
×
5
C
OUT
= 100µF × 4 Ceramic, 470µF POSCAP × 3
R
FB
= 40.2k, MODE_PLLIN = GND
V
IN
= 4.75V to 15V, I
OUT
= 0A to 40A (Note 4)
l
1.4805 1.5 1.5195 V
Input Specifications
V
RUNC
RUNC Pin On Threshold V
RUNC
Rising 1.1 1.22 1.35 V
V
RUNCHYS
RUNC Pin On Hysteresis 150 mV
V
RUNP
RUNP Pin On Threshold RUNP Pin Rising
l
0.7 0.8 0.9 V
RUNP HYS RUNP Pin Hysteresis 60 mV
HIZREG HIZREG Input Threshold V
IN
= 12V, RUNC = 5V, RUNP = V
IN
, V
OUT
= 1.5V 2.3 V
HIZREG HYS HIZREG Hysteresis V
IN
= 12V, RUNC = 5V, RUNP = V
IN
, V
OUT
= 1.5V 0.8 V
I
Q(VIN)
Input Supply Bias Current V
IN
= 12V, V
OUT
= 1.5V, Burst Mode Operation, I
OUT
= 0.1A
V
IN
= 12V, V
OUT
= 1.5V, Pulse-Skipping Mode, I
OUT
= 0.1A
V
IN
= 12V, V
OUT
= 1.5V, Switching Continuous, I
OUT
= 0.1A
Shutdown, RUN = 0, V
IN
= 12V
16
23
105
30
mA
mA
mA
µA
I
S(VIN)
Input Supply Current V
IN
= 5V, V
OUT
= 1.5V, I
OUT
= 40A
V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 40A
14.7
5.66
A
A
Output Specifications
I
OUT(DC)
Output Continuous Current
Range
V
IN
= 12V, V
OUT
= 1.5V (Note 4) 0 40 A
∆V
OUT
(Line)
V
OUT
Line Regulation Accuracy V
OUT
= 1.5V, V
IN
from 4.75V to 15V
I
OUT
= 0A
l
0.02 0.06 %/V
∆V
OUT
(Load)
V
OUT
Load Regulation Accuracy V
OUT
= 1.5V, I
OUT
= 0A to 40A, V
IN
= 12V (Note 4)
l
0.2 0.35 %
V
OUT(AC)
Output Ripple Voltage
I
OUT
= 0A, C
OUT
= 100µF
×
3 Ceramic, 470µF
×
3 POSCAP,
V
IN
= 12V, V
OUT
= 1.5V
15 mV
P-P
∆V
OUT(START)
Turn-On Overshoot
C
OUT
= 100µF
×
4 Ceramic, 470µF
×
3 POSCAP,
V
OUT
= 1.5V, I
OUT
= 0A, V
IN
= 12V, TRACK/SS = 0.1µF
5 mV
t
START
Turn-On Time C
OUT
= 100µF × 3 Ceramic, 470µF × 3 POSCAP,
No Load, TRACK/SS = 0.001µF, V
IN
= 12V
50 ms
∆V
OUTLS
Peak Deviation for Dynamic
Load
Load: 0% to 50% to 0% of Full Load
C
OUT
= 100µF × 4 Ceramic, 470µF × 3 POSCAP,
V
IN
= 12V, V
OUT
= 1.5V, CFF = 22pF
45 mV
t
SETTLE
Settling Time for Dynamic
Load Step
Load: 0% to 50% to 0% of Full Load, V
IN
= 5V,
C
OUT
= 100µF × 4 Ceramic, 470µF × 3 POSCAP,
V
IN
= 12V, V
OUT
= 1.5V, CFF = 22pF
25 µs
I
OUTPK
Output Current Limit V
IN
= 12V, V
OUT
= 1.5V
V
IN
= 5V, V
OUT
= 1.5V
54
54
A
A
Control Section
V
FB
Voltage at V
FB
Pin I
OUT
= 0A, V
OUT
= 1.5V
l
0.594 0.600 0.606 V
I
FB
Current at V
FB
Pin (Note 6) –30 –100 nA
V
OVL
Feedback Overvoltage
Lockout
Measure at V
OUTS1
l
5 7.5 10 %
I
TRACK/SS
Track Pin Soft-Start Pull-Up
Current
TRACK/SS = 0V, Default 750µs Turn on with TRACK/SS
Tied to INTV
CC
1.1 1.35 1.6 µA
t
ON(MIN)
Minimum On-Time (Note 3) 100 ns
R
FBHI
Resistor Between V
OUTS1
and V
FB
Pins
4.99 kΩ