LTC1628CUH Linear Technology, LTC1628CUH Datasheet - Page 2

• Manufacturer Part Number: LTC1628CUH
• Description: IC SW REG STP-DN 2PHS 32QFN
• Manufacturer: Linear Technology
• Type: Step-Down (Buck)r

Specifications of LTC1628CUH

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: Adj to 0.8V
• Current - Output: 3A
• Frequency - Switching: 220kHz
• Voltage - Input: 3.5 ~ 30 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

PACKAGE/ORDER I FOR ATIO
ABSOLUTE AXI U RATI GS
LTC1628/LTC1628-PG
Input Supply Voltage (V
Top Side Driver Voltages
(BOOST1, BOOST2) ...................................42V to – 0.3V
Switch Voltage (SW1, SW2) .........................36V to – 5V
INTV
(BOOST2-SW2), PGOOD .............................7V to – 0.3V
SENSE1
SENSE2
FREQSET, STBYMD, FCB,
FLTCPL Voltage ................................... INTV
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loops
V
I
V
V
2
VOSENSE1, 2
OSENSE1, 2
REFLNREG
LOADREG
V
V
RUN/SS1
SENSE1
SENSE1
FREQSET
SENSE2
SENSE2
STBYMD
OSENSE1
3.3V
OSENSE2
SGND
CC,
I
I
FCB
OUT
TH1
TH2
+
–
–
+
*PGOOD ON THE LTC1628-PG
T
EXTV
+
–
JMAX
, SENSE2
28-LEAD PLASTIC SSOP
10
11
12
13
14
Voltages ........................ (1.1)INTV
1
2
3
4
5
6
7
8
9
PARAMETER
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
= 125 C,
CC
G PACKAGE
TOP VIEW
, RUN/SS1, RUN/SS2, (BOOST1-SW1),
W
JA
+
= 95 C/W
, SENSE1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
IN
).........................36V to – 0.3V
FLTCPL*
TG1
SW1
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
SW2
TG2
RUN/SS2
IN
W W
CC
CC
–
,
U
LTC1628CG
LTC1628IG
LTC1628CG-PG
LTC1628IG-PG
ORDER PART
NUMBER
W
CONDITIONS
(Note 3); I
(Note 3)
V
(Note 3)
Measured in Servo Loop; I
Measured in Servo Loop; I
IN
U
= 3.6V to 30V (Note 3)
CC
CC
A
= 25 C. V
to – 0.3V
to – 0.3V
TH1, 2
The
U
(Note 1)
Voltage = 1.2V
IN
V
FREQSET
STBYMD
OSENSE1
3.3V
denotes the specifications which apply over the full operating
= 15V, V
SGND
I
I
FCB
OUT
TH1
TH2
I
Peak Output Current <10 s (TG1, TG2, BG1, BG2) ... 3A
INTV
Operating Temperature Range
Junction Temperature (Note 2) ............................. 125 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec)
(G Package Only) .................................................. 300 C
TH1,
TH
TH
LTC1628C/LTC1628C-PG ........................ 0 C to 85 C
LTC1628I/LTC1628I-PG ..................... – 40 C to 85 C
1
2
3
4
5
6
7
8
32-LEAD (5mm 5mm) PLASTIC QFN
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2.0V
RUN/SS1, 2
I
CC
32 31 30 29 28 27 26 25
9 10 11 12
TH2
(MUST BE SOLDERED TO PCB)
Peak Output Current ................................ 50mA
EXPOSED PAD IS SGND
, V
UH PACKAGE
OSENSE1
JA
TOP VIEW
= 5V unless otherwise noted.
= 34 C/W
13 14 15 16
, V
OSENSE2
24
23
22
21
20
19
18
17
0.792
MIN
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
IN
Voltages ...2.7V to – 0.3V
CC
CC
0.800
0.002
– 0.1
TYP
0.1
– 5
ORDER PART
LTC1628CUH
LTC1628IUH
MARKING
NUMBER
UH PART
1628
1628I
0.808
MAX
– 0.5
0.02
– 50
0.5
UNITS
1628fb
%/V
nA
%
%
V