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LTC3892-1 PDF даташит

Спецификация LTC3892-1 изготовлена ​​​​«Linear Technology» и имеет функцию, называемую «2-Phase Synchronous Step-Down DC/DC Controller».

Детали детали

Номер произв LTC3892-1
Описание 2-Phase Synchronous Step-Down DC/DC Controller
Производители Linear Technology
логотип Linear Technology логотип 

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LTC3892-1 Даташит, Описание, Даташиты
Features
n Wide VIN Range: 4.5V to 60V (65V Abs Max)
n Wide Output Voltage Range: 0.8V ≤ VOUT ≤ 99% • VIN
n Adjustable Gate Drive Level 5V to 10V (OPTI-DRIVE)
n No External Bootstrap Diodes Required
n Low Operating IQ: 29μA (One Channel On)
n Selectable Gate Drive UVLO Thresholds
n Out-of-Phase Operation Reduces Required Input
Capacitance and Power Supply Induced Noise
n Phase-Lockable Frequency: 75kHz to 850kHz
n Programmable Fixed Frequency: 50kHz to 900kHz
n Selectable Continuous, Pulse Skipping or Low Ripple
Burst Mode® Operation at Light Loads
n Selectable Current Limit (LTC3892)
n Very Low Dropout Operation: 99% Duty Cycle
n Power Good Output Voltage Monitors (LTC3892)
n Low Shutdown IQ: 3.6μA
n Small 32-Lead 5mm × 5mm QFN Package (LTC3892)
n Small 28-Lead TSSOP Package (LTC3892-1)
Applications
n Automotive and Industrial Power Systems
n Distributed DC Power Systems
n High Voltage Battery Operated Systems
LTC3892/LTC3892-1
60V Low IQ, Dual, 2-Phase
Synchronous Step-Down
DC/DC Controller
Description
The LTC®3892/LTC3892-1 is a high performance dual
step-down DC/DC switching regulator controller that
drives all N-channel synchronous power MOSFET stages.
Power loss and noise are minimized by operating the two
controller output stages out-of-phase.
The gate drive voltage can be programmed from 5V to
10V to allow the use of logic or standard-level FETs and
to maximize efficiency. Internal switches in the top gate
drivers eliminate the need for external bootstrap diodes.
A wide 4.5V to 60V input supply range encompasses a wide
range of intermediate bus voltages and battery chemistries.
Output voltages up to 99% of VIN can be regulated. OPTI-
LOOP® compensation allows the transient response and
loop stability to be optimized over a wide range of output
capacitance and ESR values.
The 29μA no-load quiescent current extends operating
run time in battery powered systems. For a comparision
of the LTC3892 to the LTC3892-1, see Table 1 in the Pin
Functions section of this data sheet.
L, LT, LTC, LTM, Burst Mode, OPTI-LOOP, Linear Technology and the Linear logo are
registered trademarks of Linear Technology Corporation. All other trademarks are the property
of their respective owners. Protected by U.S. Patents including 5481178, 5705919, 5929620,
6144194, 6177787, 6580258.
Typical Application
High Efficiency Dual 5V/12V Output Step-Down Converter
VIN
12.5V TO 60V
47µF
VO5UVT1
8A
220µF
5mΩ 5.6µH
0.1µF
RUN1 VIN RUN2
TG1
BOOST1
TG2
BOOST2
SW1 SW2
BG1 BG2
LTC3892
0.1µF
15µH 8mΩ
7.5k
100pF
2.2nF
1nF
0.1µF
SENSE1+
SENSE1–
VFB1
ITH1
TRACK/SS1
VPRG1
SENSE2+
SENSE2–
VFB2
ITH2
TRACK/SS2
DRVSET
DRVUV
INTVCC GND DRVCC
0.1µF
4.7µF
1nF
34.8k
0.1µF 100pF
1nF
V1O2UVT2
5A
150µF
100k
7.15k
3892 TA01
For more information www.linear.com/LTC3892
EEffficciieenncycyvsvOsutOpuuttpCuurtreCnut rrent
96
VIN = 12V
95 VOUT = 5V
Burst Mode OPERATION
94
93
92
91
90
89
88
0.01
GATE DRIVE
DRVCC=5V
DRVCC=6V
DRVCC=8V
DRVCC=10V
0.1 1
LOAD CURRENT (A)
10
3892 F01b
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LTC3892-1 Даташит, Описание, Даташиты
LTC3892/LTC3892-1
Absolute Maximum Ratings (Notes 1, 3)
Input Supply Voltage (VIN).......................... –0.3V to 65V
Top Side Driver Voltages
(BOOST1, BOOST2)................................ –0.3V to 76V
Switch Voltage (SW1, SW2)........................... –5V to 70V
DRVCC, (BOOST1-SW1),
(BOOST2-SW2)........................................–0.3V to 11V
BG1, BG2, TG1, TG2............................................ (Note 8)
RUN1, RUN2 Voltages................................. –0.3V to 65V
SENSE1+, SENSE2+, SENSE1
SENSE2Voltages.................................. –0.3V to 65V
PLLIN/MODE, FREQ, INTVCC Voltages.......... –0.3V to 6V
EXTVCC Voltage.......................................... –0.3V to 14V
ITH1, ITH2, VFB1, VFB2 Voltages...................... –0.3V to 6V
DRVSET, DRVUV Voltages............................ –0.3V to 6V
TRACK/SS1, TRACK/SS2 Voltages............... –0.3V to 6V
PGOOD1, PGOOD2 Voltages (LTC3892)........ –0.3V to 6V
VPRG1, ILIM Voltages (LTC3892)................. –0.3V to 6V
Operating Junction Temperature Range (Note 2)
LTC3892E, LTC3892I, LTC3892E-1,
LTC3892I-1......................................... –40°C to 125°C
LTC3892H, LTC3892H-1..................... –40°C to 150°C
LTC3892MP, LTC3892MP-1................ –55°C to 150°C
Storage Temperature Range................... –65°C to 150°C
Pin Configuration
LTC3892
TOP VIEW
32 31 30 29 28 27 26 25
FREQ 1
24 BOOST1
PLLIN/MODE 2
23 BG1
PGOOD1
PGOOD2
INTVCC
RUN1
3
4
5
6
22 VIN
33 21 EXTVCC
GND 20 DRVCC
19 BG2
RUN2 7
18 BOOST2
ILIM 8
17 SW2
9 10 11 12 13 14 15 16
UH PACKAGE
32-LEAD (5mm × 5mm) PLASTIC QFN
TJMAX = 150°C, θJA = 44°C/W
EXPOSED PAD (PIN 33) IS GND, MUST BE CONNECTED TO GND
LTC3892-1
TOP VIEW
ITH1 1
28 TRACK/SS1
VFB1
SENSE1+
SENSE1
2
3
4
27 TG1
26 SW1
25 BOOST1
FREQ 5
24 BG1
PLLIN/MODE 6
23 VIN
INTVCC 7 29 22 EXTVCC
RUN1 8 GND 21 DRVCC
RUN2
SENSE2
SENSE2+
9
10
11
20 BG2
19 BOOST2
18 SW2
VFB2 12
ITH2 13
17 TG2
16 TRACK/SS2
DRVUV 14
15 DRVSET
FE PACKAGE
28-LEAD PLASTIC TSSOP
TJMAX = 150°C, θJA = 30°C/W
EXPOSED PAD (PIN 29) IS GND, MUST BE CONNECTED TO GND
38921f
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LTC3892-1 Даташит, Описание, Даташиты
LTC3892/LTC3892-1
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3892EUH#PBF
LTC3892EUH#TRPBF
3892
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3892IUH#PBF
LTC3892IUH#TRPBF
3892
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 125°C
LTC3892HUH#PBF
LTC3892HUH#TRPBF 3892
32-Lead (5mm × 5mm) Plastic QFN
–40°C to 150°C
LTC3892MPUH#PBF
LTC3892EFE-1#PBF
LTC3892MPUH#TRPBF
LTC3892EFE-1#TRPBF
3892
LTC3892FE-1
32-Lead (5mm × 5mm) Plastic QFN
28-Lead Plastic TSSOP
–55°C to 150°C
–40°C to 125°C
LTC3892IFE-1#PBF
LTC3892IFE-1#TRPBF LTC3892FE-1
28-Lead Plastic TSSOP
–40°C to 125°C
LTC3892HFE-1#PBF
LTC3892HFE-1#TRPBF LTC3892FE-1
28-Lead Plastic TSSOP
–40°C to 150°C
LTC3892MPFE-1#PBF
LTC3892MPFE-1#TRPBF LTC3892FE-1
28-Lead Plastic TSSOP
–55°C to 150°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on nonstandard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
For more information www.linear.com/LTC3892
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