Datasheet

LTM4615
3
4615fb
For more information www.linear.com/LTM4615
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Switching Regulator Section: per Channel
V
IN(DC)
Input DC Voltage Range
l
2.375 5.5 V
V
OUT(DC)
Output DC Voltage Range
l
0.8 5.0 V
V
OUT(DC)
Output Voltage C
IN
= 22µF, C
OUT
= 100µF, R
FB
= 5.76k,
V
IN
= 2.375V to 5.5V, I
OUT
= 0A to 4A (Note 6)
0°C ≤ T
J
≤ 125°C
l
1.460
1.45
1.49
1.49
1.512
1.512
V
V
V
IN(UVLO)
Undervoltage Lockout Threshold I
OUT
= 0A 1.6 2 2.3 V
I
INRUSH(VIN)
Input Inrush Current at Start-Up I
OUT
= 0A, C
IN
= 22µF, C
OUT
= 100µF, V
OUT
= 1.5V,
V
IN
= 5.5V 0.35 A
I
Q(VIN)
Input Supply Bias Current V
IN
= 2.375V, V
OUT
= 1.5V, Switching Continuous
V
IN
= 5.5V, V
OUT
= 1.5V, Switching Continuous
Shutdown, RUN = 0, V
IN
= 5V
28
45
7 12
mA
mA
µA
I
S(VIN)
Input Supply Current V
IN
= 2.375V, V
OUT
= 1.5V, I
OUT
= 4A
V
IN
= 5.5V, V
OUT
= 1.5V, I
OUT
= 4A
3.2
1.48
A
A
I
OUT(DC)
Output Continuous Current Range V
IN
= 5.5V, V
OUT
= 1.5V (Note 6) 0 4 A
∆V
OUT(LOAD + LINE)
V
OUT
Load and Line Regulation Accuracy V
OUT
= 1.5V, 0A to 4A (Note 6)
V
IN
= 2.375V to 5.5V
l
±1.0
±1.3
±1.30
±1.6
%
%
V
OUT(AC)
Output Ripple Voltage I
OUT
= 0A, C
OUT
= 100µF
V
IN
= 5V, V
OUT
= 1.5V 12 mV
P-P
f
s
Output Ripple Voltage Frequency I
OUT
= 4A, V
IN
= 5V, V
OUT
= 1.5V 1.25 MHz
∆V
OUT(START)
Turn-On Overshoot C
OUT
= 100µF, V
OUT
= 1.5V, RUN/SS = 10nF,
I
OUT
= 0A
V
IN
= 3.3V
V
IN
= 5V
20
20
mV
mV
t
START
Turn-On Time C
OUT
= 100µF, V
OUT
= 1.5V, I
OUT
= 1A Resistive
Load, TRACK = V
IN
and RUN/SS = Float
V
IN
= 5V 0.5 ms
∆V
OUT(LS)
Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load,
C
OUT
= 100µF, V
IN
= 5V, V
OUT
= 1.5V
25 mV
t
SETTLE
Settling Time for Dynamic Load
Step
Load: 0% to 50% to 0% of Full Load,
V
IN
= 5V, V
OUT
= 1.5V
10 µs
I
OUT(PK)
Output Current Limit C
OUT
= 100µF, V
IN
= 5V, V
OUT
= 1.5V 8 A
V
FB
Voltage at FB Pin I
OUT
= 0A, V
OUT
= 1.5V
l
0.790
0.786
0.8
0.8
0.807
0.809
V
V
I
FB
0.2 µA
V
RUN
RUN Pin On/Off Threshold 0.6 0.75 0.9 V
I
TRACK
TRACK Pin Current 0.2 µA
V
TRACK(OFFSET)
Offset Voltage TRACK = 0.4V 30 mV
V
TRACK(RANGE)
Tracking Input Range 0 0.8 V
R
FBHI
Resistor Between V
OUT
and FB Pins 4.96 4.99 5.02 kΩ
∆V
PGOOD
PGOOD Range ±7.5 %
R
PGOOD
PGOOD Resistance Open-Drain Pull-Down 90 150 Ω
elecTrical characTerisTics
The l denotes the specifications which apply over the full internal
operating temperature range (Note 2), otherwise specifications are at T
A
= 25°C, V
IN
= 5V, LDO_IN = 1.2V unless otherwise noted.
Per Typical Application Figure 12.