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LTC3819 Datasheet(PDF) 2 Page - Linear Technology

Part # LTC3819
Description  2-Phase, High Efficiency, Step-Down Controller for Sun Server CPUs
Download  32 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC3819 Datasheet(HTML) 2 Page - Linear Technology

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LTC3819
3819f
ORDER PART
NUMBER
LTC3819EG
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TJMAX = 125°C, θJA = 85°C/W
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VBIAS = 5V, VRUN/SS = 5V unless otherwise noted.
(Note 1)
Input Supply Voltage (VIN).........................36V to –0.3V
Topside Driver Voltages (BOOST1,2) .........42V to – 0.3V
Switch Voltage (SW1, 2) .............................36V to – 5 V
SENSE1+, SENSE2 +, SENSE1,
SENSE2 Voltages ................... (1.1)INTVCC to –0.3V
EAIN, VOS+, VOS–, EXTVCC, INTVCC, RUN/SS,
VBIAS, ATTENIN, ATTENOUT, PGOOD, NO_CPU,
VID0–VID4, Voltages ...............................7V to – 0.3V
Boosted Driver Voltage (BOOST-SW) .......... 7V to – 0.3V
PLLFLTR, PLLIN, VDIFFOUT,
FCB Voltages ................................... INTVCC to –0.3V
ITH Voltage ................................................2.7V to –0.3V
Peak Output Current <1
µs(TG1, 2, BG1, 2)................ 3A
INTVCC RMS Output Current ................................ 50mA
Operating Ambient Temperature Range
(Note 2) .............................................. – 40
°C to 85°C
Junction Temperature (Note 3) ............................. 125
°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TOP VIEW
G PACKAGE
36-LEAD PLASTIC SSOP
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
RUN/SS
SENSE1+
SENSE1
EAIN
PLLFLTR
PLLIN
FCB
ITH
SGND
VDIFFOUT
VOS
VOS
+
SENSE2
SENSE2+
ATTENOUT
NO_CPU
VID0
VID1
PGOOD
TG1
SW1
BOOST1
VIN
BG1
EXTVCC
INTVCC
PGND
BG2
BOOST2
SW2
TG2
ATTENIN
VBIAS
VID4
VID3
VID2
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loop
VEAIN
Regulated Feedback Voltage
ITH Voltage = 1.2V; Measured at VEAIN (Note 4)
0.594
0.600
0.606
V
VSENSEMAX
Maximum Current Sense Threshold
62
75
88
mV
IINEAIN
Feedback Current
(Note 4)
– 5
– 50
nA
VLOADREG
Output Voltage Load Regulation
(Note 4)
Measured in Servo Loop,
∆ITH Voltage: 1.2V to 0.7V
0.1
0.5
%
Measured in Servo Loop,
∆ITH Voltage: 1.2V to 2V
– 0.1
– 0.5
%
VREFLNREG
Reference Voltage Line Regulation
VIN = 3.6V to 30V (Note 4)
0.002
0.02
%/V
VFCB
Forced Continuous Threshold
0.57
0.6
0.63
V
IFCB
Forced Continuous Current
– 0.17
– 1
µA
VBINHIBIT
Burst Inhibit (Constant Frequency)
Measured at FCB pin
4.3
4.8
V
Threshold
VOVL
Output Overvoltage Threshold
Measured at VEAIN
0.64
0.66
0.68
V
UVLO
Undervoltage Lockout
VIN Ramping Down
3
3.33
4
V
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF
Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/


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