Datasheet

LTM4649
3
4649f
For more information www.linear.com/LTM4649
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full internal
operating temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
IN
= 12V per typical application.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input DC Voltage
l
4.5 16 V
V
OUT(RANGE)
Output Voltage Range
l
0.6 3.3 V
V
OUT(DC)
Output Voltage, Total Variation with
Line and Load
C
IN
= 10µF × 1,C
OUT
= 100µF Ceramic,
100µF POSCAP, R
FB
= 6.65k, MODE = GND,
V
IN
= 4.5V to 16V, I
OUT
= 0A to 10A
l
1.477 1.50 1.523 V
Input Specifications
V
RUN
RUN Pin On Threshold V
RUN
Rising 1.1 1.25 1.4 V
V
RUN(HYS)
RUN Pin On Hysteresis 150 mV
I
Q(VIN)
Input Supply Bias Current V
IN
= 12V, V
OUT
= 1.5V, Burst Mode Operation
V
IN
= 12V, V
OUT
= 1.5V, Pulse-Skipping Mode
V
IN
= 12V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 12V
5
15
75
70
mA
mA
mA
µA
I
S(VIN)
Input Supply Current V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 10A 1.5 A
Output Specifications
I
OUT(DC)
Output Continuous Current Range V
IN
= 12V, V
OUT
= 1.5V (Note 4) 0 10 A
ΔV
OUT(LINE)
V
OUT
Line Regulation Accuracy V
OUT
= 1.5V, V
IN
from 4.5V to 16V I
OUT
= 0A
l
0.010 0.04 %/V
ΔV
OUT(LOAD)
V
OUT
Load Regulation Accuracy V
OUT
= 1.5V, I
OUT
= 0A to 10A, V
IN
= 12V
(Note 4)
l
0.15 0.5 %
V
OUT(AC)
Output Ripple Voltage I
OUT
= 0A, C
OUT
= 100µF Ceramic, 100µF
POSCAP, V
IN
= 12V, V
OUT
= 1.5V
15 mV
ΔV
OUT(START)
Turn-On Overshoot C
OUT
= 100µF Ceramic, 100µF POSCAP,
V
OUT
= 1.5V, I
OUT
= 0A, V
IN
= 12V
20 mV
t
START
Turn-On Time C
OUT
= 100µF Ceramic, 100µF POSCAP,
No Load, TRACK/SS = 0.01µF, V
IN
= 12V
5 ms
ΔV
OUTLS
Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load,
C
OUT
= 100uF Ceramic, 100µF POSCAP,
V
IN
= 12V, V
OUT
= 1.5V
60 mV
t
SETTLE
Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load,
C
OUT
= 100µF Ceramic, 100µF POSCAP,
V
IN
= 12V, V
OUT
=1.5V
20 µs
I
OUTPK
Output Current Limit V
IN
= 12V, V
OUT
= 1.5V (Note 4) 12 A
Control Specifications
V
FB
Voltage at V
FB
Pin I
OUT
= 0A, V
OUT
= 1.5V
l
0.593 0.60 0.607 V
I
FB
Current at V
FB
Pin (Note 6) –12 –25 nA
V
OVL
Feedback Overvoltage Lockout
l
0.64 0.66 0.68 V
I
TRACK/SS
Track Pin Soft-Start Pull-Up Current TRACK/SS = 0V 1.0 1.2 1.4 µA
t
ON(MIN)
Minimum On-Time (Note 3) 90 ns
R
FBHI
Resistor Between V
OUT_LCL
and V
FB
Pins
9.90 10 10.10 kΩ
DIFFP, DIFFN CM
RANGE
Common Mode Input Range V
IN
= 12V, Run > 1.4V 0 3.6 V
V
DIFFOUT(MAX)
Maximum DIFFOUT Voltage I
DIFFOUT
= 300µA INTV
CC
-1.4 V
V
OS
Input Offset Voltage V
OSNS
+ = V
DIFFOUT
= 1.5V, I
DIFFOUT
= 100µA 4 mV
A
V
Differential Gain 1 V/V
SR Slew Rate 2 V/µs