LTC1628I 查看數據表（PDF） - Linear Technology
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LTC1628I Datasheet PDF : 32 Pages
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LTC1628/LTC1628-PG
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (VIN).........................36V to – 0.3V
Top Side Driver Voltages
(BOOST1, BOOST2) ...................................42V to – 0.3V
Switch Voltage (SW1, SW2) .........................36V to – 5V
INTVCC, EXTVCC, RUN/SS1, RUN/SS2, (BOOST1-SW1),
(BOOST2-SW2), PGOOD .............................7V to – 0.3V
SENSE1+, SENSE2 +, SENSE1–,
SENSE2 – Voltages ........................ (1.1)INTVCC to – 0.3V
FREQSET, STBYMD, FCB,
FLTCPL Voltage ................................... INTVCC to – 0.3V
ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ... 2.7V to – 0.3V
Peak Output Current <10µs (TG1, TG2, BG1, BG2) ... 3A
INTVCC Peak Output Current ................................ 50mA
Operating Temperature Range
LTC1628C/LTC1628C-PG ........................ 0°C to 85°C
LTC1628I/LTC1628I-PG ..................... – 40°C to 85°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
RUN/SS1 1
SENSE1+ 2
SENSE1– 3
VOSENSE1 4
FREQSET 5
STBYMD 6
FCB 7
ITH1 8
SGND 9
3.3VOUT 10
ITH2 11
VOSENSE2 12
SENSE2– 13
SENSE2+ 14
28 FLTCPL
27 TG1
26 SW1
25 BOOST1
24 VIN
23 BG1
22 EXTVCC
21 INTVCC
20 PGND
19 BG2
18 BOOST2
17 SW2
16 TG2
15 RUN/SS2
G PACKAGE
28-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 95°C/W
*PGOOD ON THE LTC1628-PG
Consult factory for Military grade parts.
ORDER PART
NUMBER
LTC1628CG
LTC1628IG
LTC1628CG-PG
LTC1628IG-PG
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Main Control Loops
VOSENSE1, 2
IVOSENSE1, 2
VREFLNREG
VLOADREG
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
gm1, 2
gmGBW1, 2
IQ
VFCB
IFCB
VBINHIBIT
Transconductance Amplifier gm
Transconductance Amplifier GBW
Input DC Supply Current
Normal Mode
Standby
Shutdown
Forced Continuous Threshold
Forced Continuous Pin Current
Burst Inhibit (Constant Frequency)
Threshold
(Note 3); ITH1, 2 Voltage = 1.2V
(Note 3)
VIN = 3.6V to 30V (Note 3)
(Note 3)
Measured in Servo Loop; ∆ITH Voltage = 1.2V to 0.7V
Measured in Servo Loop; ∆ITH Voltage = 1.2V to 2.0V
ITH1, 2 = 1.2V; Sink/Source 5uA; (Note 3)
ITH1, 2 = 1.2V; (Note 3)
(Note 4)
VIN = 15V; EXTVCC Tied to VOUT1; VOUT1 = 5V
VRUN/SS1, 2 = 0V, VSTBYMD > 2V
VRUN/SS1, 2 = 0V, VSTBYMD = Open;
VFCB = 0.85V
Measured at FCB pin
q 0.792
q
q
q 0.76
– 0.30
0.800
–5
0.002
0.1
– 0.1
1.3
3
350
125
20
0.800
– 0.18
4.3
0.808
– 50
0.02
0.5
– 0.5
35
0.84
– 0.1
4.8
V
nA
%/V
%
%
mmho
MHz
µA
µA
µA
V
µA
V
UVLO
Undervoltage Lockout
VIN Ramping Down
q
3.5
4
V
VOVL
Feedback Overvoltage Lockout
Measured at VOSENSE1, 2
q 0.84 0.86 0.88
V
ISENSE
Sense Pins Total Source Current
(Each Channel); VSENSE1–, 2– = VSENSE1+, 2+ = 0V
– 85 – 60
µA
VSTBYMD MS Master Shutdown Threshold
VSTBYMD Ramping Down
0.4
0.6
V
2
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