LTC1628-PG Linear Technology, LTC1628-PG Datasheet - Page 2

• Manufacturer Part Number: LTC1628-PG
• Description: High Efficiency/ 2-Phase Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
LTC1628/LTC1628-PG
(Note 1)
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
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).................. 300 C
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loops
V
I
V
V
g
g
I
V
I
V
UVLO
V
I
V
ELECTRICAL CHARACTERISTICS
2
VOSENSE1, 2
Q
FCB
SENSE
TH1,
m1, 2
mGBW1, 2
OSENSE1, 2
REFLNREG
LOADREG
FCB
BINHIBIT
OVL
STBYMD MS
LTC1628C/LTC1628C-PG ........................ 0 C to 85 C
LTC1628I/LTC1628I-PG ..................... – 40 C to 85 C
CC,
CC
I
TH2
Peak Output Current ................................ 50mA
EXTV
+
–
, V
, SENSE2
Voltages ........................ (1.1)INTV
PARAMETER
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Transconductance Amplifier g
Transconductance Amplifier GBW
Input DC Supply Current
Forced Continuous Threshold
Forced Continuous Pin Current
Burst Inhibit (Constant Frequency)
Threshold
Undervoltage Lockout
Feedback Overvoltage Lockout
Sense Pins Total Source Current
Master Shutdown Threshold
OSENSE1
CC
Normal Mode
Standby
Shutdown
, RUN/SS1, RUN/SS2, (BOOST1-SW1),
W
+
, V
, SENSE1
OSENSE2
IN
).........................36V to – 0.3V
W W
–
,
Voltages ...2.7V to – 0.3V
m
CONDITIONS
(Note 3); I
(Note 3)
V
(Note 3)
Measured in Servo Loop; I
Measured in Servo Loop; I
I
I
(Note 4)
V
V
V
V
Measured at FCB pin
V
Measured at V
(Each Channel); V
V
TH1, 2
TH1, 2
IN
IN
RUN/SS1, 2
RUN/SS1, 2
FCB
IN
STBYMD
= 15V; EXTV
Ramping Down
U
= 3.6V to 30V (Note 3)
CC
CC
= 0.85V
A
= 1.2V; Sink/Source 5uA; (Note 3)
= 1.2V; (Note 3)
= 25 C. V
to – 0.3V
to – 0.3V
Ramping Down
TH1, 2
= 0V, V
= 0V, V
The
OSENSE1, 2
Voltage = 1.2V
CC
SENSE1
STBYMD
STBYMD
IN
Tied to V
denotes the specifications which apply over the full operating
= 15V, V
–
PACKAGE/ORDER I FOR ATIO
, 2
Consult factory for Military grade parts.
> 2V
= Open;
TH
TH
– = V
OUT1
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2.0V
V
V
RUN/SS1
SENSE1
SENSE1
FREQSET
SENSE2
SENSE2
RUN/SS1, 2
STBYMD
OSENSE1
3.3V
OSENSE2
; V
SENSE1
SGND
OUT1
I
I
FCB
OUT
TH1
TH2
+
–
–
+
*PGOOD ON THE LTC1628-PG
T
JMAX
+
= 5V
28-LEAD PLASTIC SSOP
10
11
12
13
14
, 2
1
2
3
4
5
6
7
8
9
= 5V unless otherwise noted.
+ = 0V
= 125 C,
G PACKAGE
TOP VIEW
JA
= 95 C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
– 0.30
FLTCPL
TG1
SW1
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
SW2
TG2
RUN/SS2
0.792
0.76
0.84
MIN
– 85
IN
0.4
CC
CC
U
– 0.18
0.800
0.002
0.800
– 0.1
0.86
TYP
– 60
350
125
0.1
1.3
4.3
3.5
0.6
– 5
20
3
LTC1628CG
LTC1628IG
LTC1628CG-PG
LTC1628IG-PG
ORDER PART
W
NUMBER
0.808
MAX
0.02
– 0.5
0.84
– 0.1
0.88
– 50
0.5
4.8
35
4
UNITS
mmho
U
MHz
%/V
nA
%
%
V
A
A
A
V
A
V
V
V
A
V