LTC3855IFE#PBF Linear Technology, LTC3855IFE#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC3855IFE#PBF
• Description: IC CTLR DC/DC MULTIPHASE 38SSOP
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3855IFE#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 ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 38-TSSOP Exposed Pad, 38-eTSSOP, 38-HTSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

Typical perForMance characTerisTics
500mA/DIV
TK/SS1
TK/SS2
2V/DIV
–20
–40
V
V
80
60
40
20
OUT1
OUT2
0
0
Current Sense Threshold
vs I
Tracking Up and Down
with External Ramp
V
V
V
IN
OUT1
OUT2
TH
= 12V
Voltage
= 1.8V, 1.5 LOAD
= 1.2V, 1 LOAD
0.5
I
LIM
= FLOAT
V
70
60
40
30
20
90
80
50
10
ITH
10ms/DIV
0
1
0
V
V
Maximum Current Sense Voltage
vs Feedback Voltage (Current
Foldback)
I
(V)
OUT1
OUT2
LIM
= INTV
0.1
I
LIM
1.5
= GND
FEEDBACK VOLTAGE (V)
CC
0.2
3855
I
I
LIM
3855
G10
LIM
I
LIM
0.3
2
G07
= INTV
= FLOAT
= GND
0.4
CC
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
40
20
80
70
60
50
30
10
0.5
0
0
–50
0
Maximum Current Sense
Threshold vs Common Mode
Voltage
Quiescent Current
vs Temperature without EXTV
3855
G13
0.6
–25
V
SENSE
2
COMMON MODE VOLTAGE (V)
0
TEMPERATURE (°C)
4
I
I
LIM
LIM
I
LIM
25
= INTV
= FLOAT
= GND
6
50
CC
1.6
1.4
1.2
1.0
8
75
–50
TK/SS Pull-Up Current
vs Temperature
10
100
–25
CC
3855
3855
G08
G11
125
12
0
TEMPERATURE (°C)
25
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
80
70
60
50
40
30
20
10
0
50
0
0
INTV
Maximum Current Sense
Threshold vs Duty Cycle
75
CC
20
Line Regulation
10
100
INPUT VOLTAGE (V)
3855
DUTY CYCLE (%)
I
I
LIM
G14
LIM
I
40
125
LIM
= INTV
= FLOAT
LTC3855
20
= GND
60
CC
30
80
3855
3855

3855f
G12
G09
100
40