Linear Technology Analog Devices LTM4622A, Техническое описание

Страница: 3 / 30

LTM4622A
3
Rev B
For more information www.analog.com
ELECTRICAL CHARACTERISTICS
The
l
denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel at T
A
= 25°C, V
IN1
= V
IN2
= 12V, unless otherwise
noted per the typical application shown in Figure 27.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Switching Regulator Section: per Channel
V
IN1
Input DC Voltage Range
l
3.6 20 V
V
IN2
Input DC Voltage Range 3.6V < V
IN1
< 20V
l
1.5 20 V
V
OUT(RANGE)
Output Voltage Range V
IN1 =
V
IN2
= 3.6V to 20V
l
1.5 12 V
V
OUT(DC)
Output Voltage, Total Variation
with Line and Load
C
IN
= 22µF, C
OUT
= 100µF Ceramic, R
FB
= 40.2k,
MODE = INTV
CC
,V
IN1 =
V
IN2
= 3.6V to 20V, I
OUT
= 0A to 2A
l
1.477 1.50 1.523 V
V
RUN
RUN Pin On Threshold RUN Threshold Rising
RUN Threshold Falling
1.20
0.97
1.27
1.00
1.35
1.03
V
V
I
Q(VIN)
Input Supply Bias Current V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V, MODE = GND
V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V, MODE = INTV
CC
Shutdown, RUN1 = RUN2 = 0
7
500
45
mA
µA
µA
I
S(VIN)
Input Supply Current V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V, I
OUT
= 2A 0.32 A
I
OUT(DC)
Output Continuous Current Range V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V (Note 3)
l
0 2 A
ΔV
OUT(Line)
/V
OUT
Line Regulation Accuracy V
OUT
= 1.5V, V
IN1 =
V
IN2
= 3.6V to 20V, I
OUT
= 0A
l
0.01 0.1 %/V
ΔV
OUT(Load)
/V
OUT
Load Regulation Accuracy V
OUT
= 1.5V, I
OUT
= 0A to 2A
l
0.2 1.0 %
V
OUT(AC)
Output Ripple Voltage I
OUT
= 0A, C
OUT
= 100µF Ceramic, V
IN1 =
V
IN2
= 12V,
V
OUT
= 1.5V
5 mV
ΔV
OUT(START)
Turn-On Overshoot I
OUT
= 0A, C
OUT
= 100µF Ceramic, V
IN1 =
V
IN2
= 12V,
V
OUT
= 1.5V
30 mV
t
START
Turn-On Time C
OUT
= 100µF Ceramic, No Load, TRACK/SS = 0.01µF,
V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V
1.25 ms
ΔV
OUTLS
Peak Deviation for Dynamic Load Load: 0% to 50% to 0% of Full Load, C
OUT
= 100µF
Ceramic, V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V
100 mV
t
SETTLE
Settling Time for Dynamic Load
Step
Load: 0% to 50% to 0% of Full Load, C
OUT
= 100µF
Ceramic, V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V
20 µs
I
OUTPK
Output Current Limit V
IN1 =
V
IN2
= 12V, V
OUT
= 1.5V 3 4 A
V
FB
Voltage at FB Pin I
OUT
= 0A, V
OUT
= 1.5V
l
0.592 0.60 0.608 V
I
FB
Current at FB Pin (Note 4) ±30 nA
R
FBHI
Resistor Between V
OUT
and FB Pins 60.00 60.40 60.80 kΩ
I
TRACK/SS
Track Pin Soft-Start Pull-Up Current TRACK/SS = 0V 1.25 µA
t
SS
Internal Soft-Start Time 10% to 90% Rise Time (Note 4) 400 700 μs
t
ON(MIN)
Minimum On-Time (Note 4) 20 ns
t
OFF(MIN)
Minimum Off-Time (Note 4) 45 ns
V
PGOOD
PGOOD Trip Level V
FB
With Respect to Set Output
V
FB
Ramping Negative
V
FB
Ramping Positive
–8
8
–14
14
%
%
R
PGOOD
PGOOD Pull-Down Resistance 1mA Load 20 Ω
V
INTVCC
Internal V
CC
Voltage V
IN1 =
V
IN2
= 3.6V to 20V 3.1 3.3 3.5 V