LTM4656 查看數據表（PDF） - Analog Devices
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LTM4656 Datasheet PDF : 28 Pages
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LTM4656/LTM4656-1
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
temperature range, otherwise specifications are at TA = 25°C. (Note 2), VIN = 12, VBIAS = BVIN, SHDN = VIN per the typical application.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input/Output Section
VIN
Input DC Voltage
Note 4
l 4.5
28
V
VOUT(RANGE)
Output Voltage Range
Note 4, VIN = 5V for 6V output
l6
36
V
VOUT(DC)
Output Voltage, Total Variation
with Line and Load
RFB = 11.5k, MODE_PLLIN = INTVCC
VIN = 12V, IOUT = 0A to 4A
l 23.52 24 24.48
V
IQ(VIN)
Input Supply Bias Current
VIN = 12V, VOUT = 24V, MODE_PLLIN = INTVCC
VIN = 12V, VOUT = 24V, MODE/PLLIN = GND
Shutdown, SDHN = 0, VIN = 12V
1.7
mA
76
mA
230
µA
IS(VIN)
Input Supply Current
VIN = 12V, VOUT = 24V, IOUT = 4A
8
A
IINRUSH(VIN)
Input Inrush Current at Startup
CIN = 10µF × 2, 150µF; COUT = 10µF × 2 Ceramic, 150µF
VIN = 12V, VOUT = 24V, TRACK/SS = 0.1µF
0.5
A
IOUT(DC)
Output Continuous Current Range
Note 4
VIN = 5V, VOUT = 12V (Note 4)
VIN =12V, VOUT = 24V
0
3.5
A
0
4
A
IIN Limit Range
Input Current Limit
See Typical Applications
Based on Internal 0.004 RSENSE and 50mV Trip Typical
10.6 12.5 14
A
∆VOUT(LINE)/VOUT
Line Regulation Accuracy
VOUT = 24V, VIN = 5 to 12V, IOUT = 0A
l
0.1 0.2 %/V
∆VOUT(LOAD)/VOUT Load Regulation Accuracy
VIN = 12V, VOUT = 24V, IOUT = 0A to 4.0A
l
0.3 0.6
%
VOUT(AC)
Output Ripple Voltage
IOUT = 0A, COUT = 10µF Ceramic × 2, 150µF Aluminum,
VIN = 12V, VOUT = 24V
200
mV
∆VOUT(START)
Turn-On Overshoot
IOUT = 0A, COUT = 10µF Ceramic × 2, 150µF Aluminum,
SS = 0.1µF, VIN = 12V, VOUT = 24V
100
mV
tSTART
Turn-On Time
IOUT = 0A, COUT = 10µF Ceramic × 2, 150µF Aluminum,
SS = 0.01µF, VIN = 12V, VOUT = 24V
1
ms
∆VOUTLS
Peak Deviation for Dynamic Load
Load: 0% to 50% to 0% of Full Load
COUT = 10µF Ceramic × 2, 150µF Aluminum,
VIN = 12V, VOUT = 24V
200
mV
tSETTLE
Settling Time for Dynamic Load Step Load: 0% to 50% to 0% of Full Load
COUT = 10µF Ceramic × 2, 150µF Aluminum,
VIN = 12V, VOUT = 24V
200
µs
Regulator Specifics
VFB
IFB
RFBHI
SS (I)
DCMAX
VINTVCC
VINTVCC(LOAD)
UVLO
fS
fSYNC
fLOW
fNOM
fHIGH
tON(MIN)
Voltage at VFB Pin
Current at VFB Pin
Resistor Between VOUT and VFB Pins
Track Pin Soft-Start Pull-Up Current
Maximum Duty Cycle
Internal VCC Voltage
INTVCC Load Regulation
INTVCC UVLO Thresholds
Typical Output Ripple Voltage Frequency
SYNC Frequency Range
Lowest Frequency
Nominal Frequency
Highest Frequency
Minimum On-Time
IOUT = 0A, VIN = 12V, VOUT = 24V
(Note 6)
VSS = 0V
FB = 1.0V (Note 6)
6V < VIN < 20V
ICC = 0mA to 50mA
VINTVCC Ramping Up
VINTVCC Ramping Down (Note 6)
VIN = 12V, VOUT = 24V, RfSET = Selectable
RfSET = 47.5k
RfSET =68.1k
RfSET = 95.3k
Note 3
l 1.180 1.200 1.220
V
±5 ±50
nA
221
kΩ
7 10 13
µA
96
%
5.2 5.4 5.6
V
0.5 2
%
4.3 4.5
V
3.6 3.8
V
350
500 kHz
350
780 kHz
350
kHz
500
kHz
750
kHz
110
ns
Rev. 0
For more information www.analog.com
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