LTC3850EUF#PBF Linear Technology, LTC3850EUF#PBF Datasheet - Page 7

• Manufacturer Part Number: LTC3850EUF#PBF
• Description: IC CNTRLR STP DWN SYNC 28-QFN
• Manufacturer: Linear Technology
• Series: PolyPhase®r
• Type: Step-Down (Buck)r

Specifications of LTC3850EUF#PBF

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.8 ~ 23.3 V
• Current - Output: 100mA
• Frequency - Switching: 250kHz ~ 780kHz
• Voltage - Input: 4 ~ 24 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-QFN
• Primary Input Voltage: 24V
• No. Of Outputs: 2
• Output Current: 100mA
• No. Of Pins: 28
• Operating Temperature Range: -40°C To +85°C
• Msl: MSL 1 - Unlimited
• Supply Voltage Range: 4V To 24V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

TYPICAL PERFORMANCE CHARACTERISTICS
1.5Ω LOAD
3Ω LOAD
TK/SS1
TK/SS2
2V/DIV
1V/DIV
1V/DIV
V
V
OUT1
OUT2
3.3V
1.8V
–20
–40
80
60
40
20
0
0
Tracking Up and Down
with External Ramp
Current Sense Threshold
vs I
TH
Voltage
0.5
I
LIM
10ms/DIV
60
50
30
80
70
40
20
10
V
0
= FLOAT
ITH
0
Maximum Current Sense Voltage vs
Feedback Voltage (Current Foldback)
1
(V)
I
I
LIM
LIM
0.1
= INTV
= GND
0.2
1.5
FEEDBACK VOLTAGE (V)
0.3
CC
38501 G10
38501 G13
0.4
I
I
I
LIM
LIM
LIM
2
0.5
= INTV
= FLOAT
= GND
0.6
CC
0.7
70
60
40
30
20
80
50
10
0
5
4
3
2
1
0
0
5
Quiescent Current
vs Input Voltage without EXTV
Maximum Current Sense Threshold
vs Common Mode Voltage
0.8
38501 G16
V
0.9
SENSE
1
10
COMMON MODE VOLTAGE (V)
INPUT VOLTAGE (V)
I
I
LIM
LIM
I
LIM
2
= INTV
= FLOAT
15
= GND
CC
3
2.00
1.75
1.50
1.25
1.00
–50
20
TK/SS Pull-Up Current
vs Temperature
4
–25
38501 G14
CC
38501 G11
25
5
LTC3850/LTC3850-1
TEMPERATURE (°C)
0
5.25
5.00
4.75
4.50
4.25
4.00
3.75
3.50
100
25
90
80
70
60
50
40
30
20
10
0
0
0
INTV
Maximum Current Sense
Threshold vs Duty Cycle
50
CC
20
5
Line Regulation
75
INPUT VOLTAGE (V)
38501 G17
DUTY CYCLE (%)
I
I
LIM
LIM
I
10
40
LIM
100
= INTV
= FLOAT
= GND
60
15
CC
20
80
38501 G12
38501 G15
38501fc
7
100
25