LTC3855EFE#PBF Linear Technology, LTC3855EFE#PBF Datasheet - Page 35

• Manufacturer Part Number: LTC3855EFE#PBF
• Description: IC BUCK SYNC ADJ 25A DL 38TSSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3855EFE#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.6 ~ 3.3 V, 0.6 ~ 12.5 V
• Current - Output: 25A
• Frequency - Switching: 250kHz ~ 770kHz
• Voltage - Input: 4.5 ~ 38 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP Exposed Pad, 38-eTSSOP, 38-HTSSOP
• Primary Input Voltage: 38V
• No. Of Outputs: 2
• Output Voltage: 12.5V
• No. Of Pins: 38
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Switching Frequency Max: 770kHz
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

Typical applicaTions
L1, L2: VITEC 59PR9875
C
C
OUT1
OUT2
5.49k
18k
150pF
150pF
0.1µF
0.1µF
, C
, C
OUT3
OUT4
1.5nF
1nF
: MURATA GRM31CR60J107ME39L
: SANYO 2R5TPE330M9
100
100
1nF
20k
20k
20k
40.2k
100
TK/SS1
I
V
SGND
V
I
TK/SS2
SENSE2
SENSE2
DIFFP
TH1
TH2
FB1
FB2
1nF
+
–
Figure 19. 1.8V, 15A and 1.2V, 15A Supply, f
PGOOD1
PGOOD2
100
LTC3855
100k
100k
100k
BOOST1
BOOST2
EXTV
PGND1
INTV
PGND2
TG1
BG1
BG2
V
CC
CC
IN
0.1µF
4.7µF
0.1µF
CMDSH-3
CMDSH-3
0.1µF
2.2
SW
= 400kHz
M1
RJK0305DPB
M2
RJK0330DPB
M3
RJK0305DPB
M4
RJK0330DPB
0.4µH
0.4µH
L1
L2
10µF
2
0.002
0.002
+
3855 F19
LTC3855
82µF
25V
C
100µF
6.3V
C
100µF
6.3V
2
OUT1
OUT3
+
+
C
330µF
2.5V
C
330µF
2.5V
OUT2
2
OUT4
2

V
4.5V TO
20V
V
1.8V
15A
V
1.2V
15A
IN
OUT1
OUT2
3855f