LTC3850EUF#PBF Linear Technology, LTC3850EUF#PBF Datasheet - Page 2

• 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: -

ABSOLUTE MAXIMUM RATINGS
LTC3850/LTC3850-1
Input Supply Voltage (V
Input Supply Voltage (V
Input Supply Transient Voltage (V
Top Side Driver Voltages
Switch Voltage (SW1, SW2) ......................... 28V to –5V
Switch Voltage (SW1, SW2),
INTV
(BOOST1-SW1), (BOOST2-SW2) ................. 6V to –0.3V
PIN CONFIGURATION
2
LTC3850I Only ....................................... 30V to –0.3V
INTV
BOOST1, BOOST2 .................................. 34V to –0.3V
LTC3850I Only .......................................... 30V to –5V
CC
, RUN1, RUN2, PGOOD, EXTV
CC
≥ 5V, LTC3850I Only ................... 34V to –0.3V
*PIN 14 = I
I
LIM
(EXTV
SENSE1
SENSE1
SENSE2
SENSE2
LIM
TK/SS1
TK/SS2
RUN1
SGND
RUN2
V
V
CC
I
I
T
FOR LTC3850GN, EXTV
TH1
TH2
FB1
FB2
28-LEAD NARROW PLASTIC SSOP
JMAX
)*
+
–
–
+
10
11
12
13
14
IN
IN
1
2
3
4
5
6
7
8
9
= 125°C, θ
) ......................... 28V to –0.3V
),
GN PACKAGE
TOP VIEW
JA
T
JMAX
= 95°C/W
IN
28
27
26
25
24
23
22
21
20
19
18
17
16
15
CC
= 125°C, θ
) < 500ms, with
FOR LTC3850GN-1
FREQ/PLLFLTR
MODE/PLLIN
SW1
TG1
BOOST1
BG1
V
INTV
BG2
PGND
BOOST2
TG2
SW2
PGOOD
IN
CC
CC
,
JA
= 34°C/W, EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
SENSE1
SENSE2
TK/SS1
TK/SS2
VFB1
VFB2
ITH1
ITH2
28-LEAD (4mm × 5mm) PLASTIC QFN
–
–
1
2
3
4
5
6
7
8
28 27 26 25 24
9 10
UFD PACKAGE
(Note 1)
TOP VIEW
11 12 13
29
SENSE1
SENSE2
MODE/PLLIN, I
Voltages ................................................ INTV
I
INTV
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature (Note 3) ............................. 125°C
Storage Temperature Range ...................–65°C to 125°C
Lead Temperature (Soldering, 10 sec)
TH1
23
14
(GN Package) .................................................... 300°C
22
21
20
19
18
17
16
15
, I
CC
BOOST1
BG1
VIN
INTV
BG2
PGND
BOOST2
TG2
TH2
Peak Output Current ................................100mA
+
–
CC
EXPOSED PAD (PIN 29) IS GND, MUST BE SOLDERED TO PCB
, SENSE2
, V
Voltages ..................................... 5.5V to –0.3V
SENSE2
FB1
TK/SS1
TK/SS2
T
V
V
I
I
JMAX
TH1
TH2
FB1
FB2
LIM
, V
–
28-LEAD (4mm × 4mm) PLASTIC QFN
1
2
3
4
5
6
7
= 125°C, θ
FB2
,TK/SS1,TK/SS2, FREQ/PLLFLTR
+
, SENSE1
28 27 26 25 24 23
8
Voltages .................. 2.7V to –0.3V
9
UF PACKAGE
JA
10 11 12 13 14
TOP VIEW
= 37°C/W, θ
29
–
,
JC
22
= 2.6°C/W
21
20
19
18
17
16
15
BOOST1
BG1
V
INTV
BG2
PGND
BOOST2
IN
CC
CC
to –0.3V
38501fc