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LTC7802EUFDM 数据表(PDF) 32 Page - Analog Devices

部件名 LTC7802EUFDM
功能描述  40V Low IQ, 3MHz Dual, 2-Phase Synchronous Step-Down Controller with Spread Spectrum
PDF  34 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

LTC7802EUFDM 数据表(HTML) 32 Page - Analog Devices

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LTC7802
32
Rev. 0
For more information www.analog.com
TYPICAL APPLICATIONS
Figure 11. High Efficiency 500kHz 1V, 20A and 2.5V, 10A Regulator with Spread Spectrum
0.1µF
D1
D2
L1
1µH
MTOP1
MTOP2
1.5m
MBOT2
MBOT1
0.1µF
L2
0.2µH
100µF
3m
34k
16k
7802 F11a
LTC7802
RUN1
RUN2
SW1
BG1
TG1
BOOST1
SENSE1–
VIN
INTVCC
VIN
4.5V TO 38V
VOUT1
2.5V, 10A
VOUT2
1V, 20A
SENSE1+
SENSE2–
TRACK/SS2
ITH2
VFB2
PLLIN/SPREAD
MODE
SENSE2+
SW2
BG2
TG2
BOOST2
VFB1
PGOOD2
PGOOD1
INTVCC
ITH1
TRACK/SS1
FREQ
GND
15k
60.4k
0.1µF
3.3nF
5k
47pF
1.5nF
8k
0.1µF
75k
4.7µF
fSW = 500kHz
CIN
100µF
63V
4.7µF
×4
+
INTVCC
COUT1
220µF
4V
+
47pF
100µF
×3
COUT2
470µF
2.5V
+
L1: WURTH 744311100
L2: WURTH 744308020
COUT1: KEMET T520V227M004ATE007
COUT2: KEMET T520V477M2R5ATE006
CIN: SUNCON 63HVPF100M
MTOP1: VISHAY SIR426DP
MTOP2: VISHAY SIJA72ADP
MBOT1,2: VISHAY SIR640ADP
D1,2: CENTRAL SEMI CMDSH-4E
2.2nF
2.2nF
33
60
22pF
EXTVCC
22pF
FORCED CONTINUOUS OPERATION
VOUT1 = 2.5V
VIN = 6V
VIN = 12V
VIN = 24V
LOAD CURRENT (A)
0
2
4
6
8
10
12
50
60
70
80
90
100
OUT1
7802 F11b
IN
VIN = 36V
5A LOAD ON EACH CHANNEL
400ns/DIV
7802 F11c
VSW1
20V/DIV
VSW2
20V/DIV
INDUCTOR L1
CURRENT
5A/DIV
INDUCTOR L2
CURRENT
5A/DIV
FORCED CONTINUOUS OPERATION
VOUT2 = 1V
VIN = 6V
VIN = 12V
VIN = 24V
LOAD CURRENT (A)
0
5
10
15
20
25
50
60
70
80
90
100
OUT2
7802 F11d
VOUT1 Efficiency vs Load Current
Operating Waveforms
at VIN = 36V
VOUT2 Efficiency vs Load Current



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