参数资料
型号: LTC1736IG#TR
厂商: Linear Technology
文件页数: 1/28页
文件大小: 0K
描述: IC REG SW SYNC STEPDWN HE 24SSOP
标准包装: 1,800
应用: 转换器,Intel Pentium? II,III
输入电压: 3.5 V ~ 36 V
输出数: 1
输出电压: 0.93 V ~ 2 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-SSOP(0.209",5.30mm 宽)
供应商设备封装: 24-SSOP
包装: 带卷 (TR)
LTC1736
5-Bit Adjustable
High Efficiency Synchronous
Step-Down Switching Regulator
FEATURES
DESCRIPTIO
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Dual N-Channel MOSFET Synchronous Drive
Synchronizable/Programmable Fixed Frequency
Wide V IN Range: 3.5V to 36V Operation
5-Bit Digital-to-Analog V OUT Selection:
0.925V to 2.00V Range with 50mV/25mV Steps
OPTI-LOOP TM Compensation Minimizes C OUT
± 1% Output Voltage Accuracy
Power Good Output Voltage Monitor
Active Voltage Positioning Compatible
Output Overvoltage Crowbar Protection
Internal Current Foldback
Latched Short-Circuit Shutdown Timer
with Defeat Option
Forced Continuous Control Pin
Optional Programmable Soft-Start
Remote Output Voltage Sense
Available in 24-Lead SSOP Package
The LTC ? 1736 is a synchronous step-down switching
regulator controller optimized for CPU power. The output
voltage is programmed by a 5-bit digital-to-analog con-
verter (DAC) that adjusts the output voltage from 0.925V
to 2.00V according to Intel mobile VID specifications. The
0.8V reference is compatible with future microprocessor
generations.
The operating frequency (synchronizable up to 500kHz) is
set by an external capacitor allowing maximum flexibility
in optimizing efficiency. The output voltage is monitored by
a power good window comparator that indicates when the
output is within 7.5% of its programmed value.
Protection features include: internal foldback current lim-
iting, output overvoltage crowbar and optional short-cir-
cuit shutdown. Soft-start is provided by an external capaci-
tor that can be used to properly sequence supplies. The
APPLICATIO S
operating current level is user-programmable via an exter-
nal current sense resistor. Wide input supply range allows
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Notebook and Palmtop Computers, PDAs
Power Supply for Mobile Pentium ? II and
Pentium III Processors
Low Voltage Power Supplies
, LTC and LT are registered trademarks of Linear Technology Corporation.
operation from 3.5V to 30V (36V maximum).
Pin defeatable Burst Mode TM operation provides high effi-
ciency at low load currents. OPTI-LOOP compensation
allows the transient response to be optimized over a wide
range of output capacitance and ESR values.
OPTI-LOOP and Burst Mode are trademarks of Linear Technology Corporation.
Pentium is a registered trademark of Intel Corporation.
TYPICAL APPLICATIO
C OSC
47pF
V IN
5V TO 24V
V OSENSE SENSE
SENSE
CERAMIC
C SS
0.1 μ F
R C 330pF
33k
C C2
47pF
C C1
C OSC
RUN/SS
I TH
PGOOD
VID4
VID3
VID2
VID1
VID0
SGND
LTC1736
V IN
TG
SW
VIDV CC
INTV CC
BOOST
BG
PGND
+
D B
CMDSH-3
+
4.7 μ F
C B
0.22 μ F
M1
FDS6680A
M2
FDS6680A
× 2
C IN
22 μ F/50V
× 2
L1
1.2 μ H
D1
MBRS340T3
R SENSE
0.004 ?
V OUT
1.35V TO 1.60V
12A
+ C OUT
180 μ F/4V
× 4
C OUT : PANASONIC EEFUEOG181R
C IN : MARCON THCR70EIH226ZT
L1: PANASONIC ETQP6RZIR20HFA
R SENSE : IRC LRF2010-01-R004J
1000pF
47pF
1736 F01
Figure 1. High Efficiency Step-Down Converter
1
相关PDF资料
PDF描述
1210-393K COIL 39.0UH FERRITE SMD
LTC1736IG#PBF IC SW REG STEP-DONW SYNC 24-SSOP
1210-333K COIL 33.0UH FERRITE SMD
1210-273K COIL 27.0UH FERRITE SMD
LTC1736IG IC REG SW SYNC STEPDWN HE 24SSOP
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