LTM4620I Просмотр технического описания (PDF) - Linear Technology
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LTM4620I Datasheet PDF : 40 Pages
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LTM4620
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified internal
operating temperature range (Note 2). Specified as each individual output channel. TA = 25°C, VIN = 12V and VRUN1, VRUN2 at 5V
unless otherwise noted. Per the typical application in Figure 23.
SYMBOL
PARAMETER
CONDITIONS
VIN
Input DC Voltage
l
VOUT
Output Voltage
(Note 8)
l
VOUT1(DC),
VOUT2(DC)
Output Voltage, Total Variation with CIN = 22µF × 3, COUT = 100µF × 1 Ceramic,
l
Line and Load
470µF POSCAP, VOUT = 1.5V
Input Specifications
VRUN1, VRUN2
RUN Pin On/Off Threshold
VRUN1HYS, VRUN2HYS RUN Pin On Hysteresis
IINRUSH(VIN)
Input Inrush Current at Start-Up
IQ(VIN)
Input Supply Bias Current
IS(VIN)
Input Supply Current
Output Specifications
RUN Rising
IOUT = 0A, CIN = 22µF ×3, CSS = 0.01µF,
COUT = 100µF ×3, VOUT1 = 1.5V, VOUT2 = 1.5V,
VIN = 12V
VIN = 12V, VOUT = 1.5V, Burst Mode Operation
VIN = 12V, VOUT = 1.5V, Pulse-Skipping Mode
VIN = 12V, VOUT= 1.5V, Switching Continuous
Shutdown, RUN = 0, VIN = 12V
VIN = 5V, VOUT = 1.5V, IOUT = 13A
VIN = 12V, VOUT = 1.5V, IOUT = 13A
IOUT1(DC), IOUT2(DC)
ΔVOUT1(LINE)/VOUT1
ΔVOUT2(LINE)/VOUT2
ΔVOUT1/ VOUT1
ΔVOUT2 / VOUT2
VOUT1(AC), VOUT2(AC)
Output Continuous Current Range
Line Regulation Accuracy
Load Regulation Accuracy
Output Ripple Voltage
fS (Each Channel)
fSYNC
(Each Channel)
Output Ripple Voltage Frequency
SYNC Capture Range
VIN = 12V, VOUT = 1.5V (Notes 7, 8)
VOUT = 1.5V, VIN from 4.5V to 16V
l
IOUT = 0A for Each Output,
For Each Output, VOUT = 1.5V, 0A to 13A
l
VIN = 12V (Note 7)
For Each Output, IOUT = 0A, COUT = 100µF ×3/
X7R/Ceramic, 470µF POSCAP, VIN = 12V,
VOUT = 1.5V, Frequency = 400kHz
VIN = 12V, VOUT = 1.5V, fSET = 1.25V (Note 4)
∆VOUTSTART
(Each Channel)
tSTART
(Each Channel)
∆VOUT(LS)
(Each Channel)
tSETTLE
(Each Channel)
IOUT(PK)
(Each Channel)
Turn-On Overshoot
Turn-On Time
Peak Deviation for Dynamic Load
Settling Time for Dynamic Load
Step
Output Current Limit
COUT = 100µF/X5R/Ceramic, 470µF POSCAP,
VOUT = 1.5V, IOUT = 0A VIN = 12V
COUT = 100µF/X5R/Ceramic, 470µF POSCAP,
No Load, TRACK/SS with 0.01µF to GND,
VIN = 12V
Load: 0% to 50% to 0% of Full Load
COUT = 22µF ×3/X5R/Ceramic, 470µF POSCAP
VIN = 12V, VOUT = 1.5V
Load: 0% to 50% to 0% of Full Load,
VIN = 12V, COUT = 100µF, 470µF POSCAP
VIN = 12V, VOUT = 1.5V
Control Section
VFB1, VFB2
Voltage at VFB Pins
IOUT = 0A, VOUT = 1.5V
l
IFB1, IFB2
(Note 6)
VOVL
Feedback Overvoltage Lockout
l
MIN
4.5
0.6
1.477
1.1
0
400
0.592
0.64
TYP MAX UNITS
16
V
2.5
V
1.5 1.523
V
1.25 1.40
V
150
mV
1
A
5
mA
15
mA
65
mA
50
µA
4.6
A
1.853
A
13
A
0.01 0.025 %/V
0.5 0.75
%
15
mVP-P
500
kHz
780
kHz
10
mV
5
ms
30
mV
20
µs
20
A
0.600 0.606
V
–5 –20
nA
0.66 0.68
V
For more information www.linear.com/LTM4620
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