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參數(shù)資料
| 型號： | LTC3738CUHF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 3-Phase Buck Controller for Intel VRM9/VRM10 with Active Voltage Positioning |
| 中文描述： | 5 A SWITCHING CONTROLLER, 630 kHz SWITCHING FREQ-MAX, PQCC38 |
| 封裝： | 7 X 5 MM, PLASTIC, M0-220WHKD, QFN-38 |
| 文件頁數(shù)： | 1/32頁 |
| 文件大?。?/td> | 316K |
| 代理商： | LTC3738CUHF |
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LTC3738
3738f
APPLICATIU
FEATURES
TYPICAL APPLICATIO
U
DESCRIPTIO
The LTC
3738 is a 3-phase synchronous step-down switch-
ing regulator controller that drives all N-channel external
power MOSFET stages in a phase-lockable, fixed fre-
quency architecture. The 3-phase technique effectively
triples the fundamental frequency, improving transient
response while operating each controller at an optimal
frequency for efficiency and ease of thermal design. Light
load efficiency is optimized by using a choice of output
Stage Shedding or Pulse Skip mode technology.
The LTC3738 also allows users to program load slope via
a resistor for AVP control. Both external and internal
thermal sensing are available from the on-chip thermal
detector and comparator.
A differential amplifier provides sensing of both the high
and low sides of the output voltage.
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 a 1
μ
s timeout.
U
3-Phase Buck Controller
for Intel VRM9/VRM10 with
Active Voltage Positioning
, LTC and LT are registered trademarks of Linear Technology Corporation.
OPTI-LOOP is a registered trademark of Linear Technology Corporation.
Stage Shedding is a trademark of Linear Technology Corporation.
■
3-Phase Controller with Onboard MOSFET Drivers
■
Programmable Active Voltage Positioning (AVP)
with True Current Sensing
■
Programmable External Thermal Detection or
Internal Thermal Sensing
■
Precise Output Current Matching Optimizes
Thermal Performance and Solution Size
■
Supports Starting into Precharged V
OUTS
■
Differential Amplifier Accurately Senses V
OUT
■
PWM, Pulse Skip and Stage Shedding
TM
Operation
■
Synchronizable
■
210kHz to 530kHz Per Phase, Fixed Frequency
■
Output Power Good Indicator with Adaptive Blanking
■
Adjustable Soft-Start Current Ramping
■
Short-Circuit Shutdown Timer with Defeat Option
■
OPTI-LOOP
Compensation Minimizes C
OUT
■
38-Lead (5mm
×
7mm) QFN Package
■
High Performance Notebook Computers
■
Servers, Desktop Computers and Workstations
VRM10 Step-Down Controller
0.002
0.8
μ
H
22
μ
F
×
2
0.002
0.8
μ
H
V
IN
0.002
470
μ
F
×
4
V
0.8375V TO 1.6000V
V
5V TO 28V
0.8
μ
H
V
IN
6 VID BITS
3738 TA01
TG1
V
CC
0.1
μ
F
SW3 SW2 SW1
SW1
BG1
SENSE1
+
SENSE1
–
BOOST1
BOOST2
BOOST3
TG2
SW2
BG2
PGND
PGOOD
FCB/SYNC
OUTEN
PLLFLTR
I
TH
SS
0.1
μ
F
100pF
680pF
5k
ON/OFF
POWER GOOD INDICATOR
MODE SELECTION/SYNC IN
SGND
EAIN
AVP
SENSE2
+
SENSE2
–
TG3
SW3
BG3
VID0-VID5
SENSE3
+
SENSE3
–
IN
+
IN
–
TSNS
VR_HOTB
THERMAL INPUT
VR HOT INDICATOR
+
10
μ
F
5V
+
LTC3738
U.S. Patent Numbers: 5481178, 5994885, 5929620, 6177787, 6144194, 6580258, 6462525,
6593724, 6674274, 6100678 pending on AVP technique.
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