900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC3733CG Datasheet

3-Phase Buck Controllers

No Preview Available !

LTC3733/LTC3733-1
3-Phase, Buck
Controllers for AMD CPUs
FEATURES
s 3-Phase Controller with Onboard MOSFET Drivers
s Current Mode Control Ensures Current Sharing
s Differential Amplifier Accurately Senses VOUT
s ±5% Output Current Matching Optimizes Thermal
Performance and Size of Inductors and MOSFETs
s Reduced Input and Output Capacitance
s Supports Active Voltage Positioning
s VID Programmable Output Voltage from 0.8V to 1.55V
(AMD OpteronTM CPU)
s 6-Phase, 90A to 120A Operation
s Output Power Good Indicator with Adaptive Blanking
s 210kHz to 530kHz Per Phase, PLL, Fixed Frequency
s Synchronizable (LTC3733-1)
s PWM, Stage Shedding or Burst Mode® Operation
s OPTI-LOOP® Compensation Minimizes COUT
s Adjustable Soft-Start Current Ramping
s Short-Circuit Shutdown Timer with Defeat Option
s No_CPU Detection
s 36-Lead 0.209" SSOP and 38-Lead (5mm × 7mm) QFN
U
APPLICATIO S
s High Performance Notebook Computers
s Servers, Desktop Computers and Workstations
DESCRIPTIO
The LTC®3733 family are PolyPhase® synchronous step-
down switching regulator controllers that drive all
N-channel external power MOSFET stages in a phase-
lockable, fixed frequency architecture. The 3-phase con-
troller drives its output stages with 120° phase separation
at frequencies of up to 530kHz per phase to minimize the
RMS current dissipated by the ESR of both the input and
output filter capacitors. The 3-phase technique effectively
triples the fundamental frequency, improving transient
response while operating each phase at an optimal fre-
quency for efficiency and ease of thermal design. Light
load efficiency is optimized by using a choice of output
stage shedding or Burst Mode technology.
A differential amplifier provides true remote sensing of both
the high and low sides of the output voltage at load points.
Soft-start and a defeatable, timed short-circuit shutdown
protect the MOSFETs and the load. A foldback current
circuit also provides protection for the external MOSFETs
under short-circuit or overload conditions. An all-“1” VID
detector turns off the regulator after 1µs timeout.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode, OPTI-LOOP and PolyPhase are registered trademarks of Linear Technology
Corporation. AMD Opteron is a trademark of Advanced Micro Devices, Inc.
TYPICAL APPLICATIO
5V
10µF
0.1µF
SW3 SW2 SW1
POWER GOOD INDICATOR
OPTIONAL SYN IN
5 VID BITS
ON/OFF
680pF
5k
0.1µF
100pF
VCC
TG1
LTC3733-1 SW1
BOOST1
BOOST2
BG1
BOOST3
SENSE1+
SENSE1
PGOOD
PLLIN
PLLFLTR
VID0-VID4
RUN
ITH
SS
SGND
EAIN
IN
IN+
TG2
SW2
BG2
PGND
SENSE2+
SENSE2
TG3
SW3
BG3
SENSE3+
SENSE3
L1 0.8µH
D1
0.002
VIN
+
5V TO 28V
22µF
35V
×2
VIN
L2 0.8µH
0.002
D2
VOUT
0.8V TO 1.55V
65A
VIN
L3 0.8µH
0.002
D3
+
COUT
470µF
4V
×4
3733 F01
Figure 1. High Current Triple Phase Step-Down Converter
3733f
1


Linear Technology Electronic Components Datasheet

LTC3733CG Datasheet

3-Phase Buck Controllers

No Preview Available !

LTC3733/LTC3733-1
ABSOLUTE AXI U RATI GS (Note 1)
Topside Driver Voltages (BOOSTN) ............ 38V to –0.3V
Switch Voltage (SWN)................................... 32V to –5V
Boosted Driver Voltage (BOOSTN – SWN) .... 7V to –0.3V
Peak Output Current <1ms (TGN, BGN) ..................... 5A
Supply Voltage (VCC), PGOOD
Pin Voltages ................................................ 7V to –0.3V
PLLIN, RUN, SS,
PLLFLTR, FCB Voltages ............................. VCC to –0.3V
ITH Voltage ................................................ 2.4V to –0.3V
Operating Ambient Temperature Range ....... 0°C to 70°C
Junction Temperature (Note 2) ............................. 125°C
Storage Temperature Range
LTC3733CG .......................................–65°C to 150°C
LTC3733CUHF-1 ...............................–65°C to 125°C
Lead Temperature (LTC3733CG)
(Soldering, 10 sec) ............................................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
VID1 1
RUN 2
PLLFLTR 3
FCB 4
IN+ 5
IN6
DIFFOUT 7
EAIN 8
SGND 9
SENSE1+ 10
SENSE111
SENSE2+ 12
SENSE213
SENSE314
SENSE3+ 15
SS 16
ITH 17
VID2 18
36 VID0
35 PGOOD
34 BOOST1
33 TG1
32 SW1
31 BOOST2
30 TG2
29 SW2
28 VCC
27 BG1
26 PGND
25 BG2
24 BG3
23 SW3
22 TG3
21 BOOST3
20 VID4
19 VID3
G PACKAGE
36-LEAD PLASTIC SSOP
TJMAX = 125°C, θJA = 95°C/W
ORDER PART
NUMBER
LTC3733CG
TOP VIEW
PLLFLTR 1
FCB 2
IN+ 3
IN4
DIFFOUT 5
EAIN 6
SGND 7
SENSE1+ 8
SENSE19
SENSE2+ 10
SENSE211
SENSE312
38 37 36 35 34 33 32
39
13 14 15 16 17 18 19
31 SW1
30 BOOST2
29 TG2
28 SW2
27 VCC
26 DRVCC
25 BG1
24 PGND
23 BG2
22 BG3
21 SW3
20 TG3
UHF PACKAGE
38-LEAD (7mm × 5mm) PLASTIC QFN
TJMAX = 125°C, θJA = 34°C/W
EXPOSED PAD IS SGND (PIN 39) MUST BE SOLDERED TO PCB
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
LTC3733CUHF-1
UHF PART
MARKING
37331
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = VRUN = VSS = 5V unless otherwise noted.
SYMBOL
PARAMETER
Main Control Loop
VREGULATED Regulated Voltage at IN+
CONDITIONS
(Note 3); VID Code = 10011, VITH = 1.2V
VSENSEMAX
IMATCH
Maximum Current Sense Threshold
Current Match
VEAIN = 0.5V, VITH Open,
VSENSE1, VSENSE2, VSENSE3– = 0.8V, 1.55V
Worst-Case Error at VSENSE(MAX)
MIN TYP MAX UNITS
1.067 1.075 1.083
V
q 1.064 1.075 1.086
V
65
75
85
mV
q 62
75
88
mV
–5
5
%
3733f
2


Part Number LTC3733CG
Description 3-Phase Buck Controllers
Maker Linear
PDF Download

LTC3733CG Datasheet PDF






Similar Datasheet

1 LTC3733CG 3-Phase Buck Controllers
Linear
2 LTC3733CUHF-1 3-Phase Buck Controllers
Linear





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy