參數(shù)資料
型號(hào): LTC1702I
廠商: Linear Technology Corporation
元件分類(lèi): 通用總線功能
英文描述: Synchronous 8-Bit Up/Down Binary Counters 24-SOIC 0 to 70
中文描述: 雙550kHz的同步二相開(kāi)關(guān)穩(wěn)壓器控制器
文件頁(yè)數(shù): 7/36頁(yè)
文件大?。?/td> 350K
代理商: LTC1702I
7
LTC1702
TEST CIRCUIT
Test Circuit 1
controllers allow, improving stability and maximizing tran-
sient response. The 800mV internal reference allows
regulated output voltages as low as 800mV without exter-
nal level shifting amplifiers.
The LTC1702’s synchronous switching logic transitions
automatically into Burst Mode operation, maximizing effi-
ciency with light loads. Onboard power-good and over-
voltage (OV) fault flags indicate when the output is in
regulation or an OV fault has occurred. The OV flag can be
set to latch the device off when an OV fault has occurred,
or to automatically resume operation when the fault is
removed.
The LTC1702 takes a low input voltage and generates two
lower output voltages at very high currents. Its strengths
are small size, unmatched regulation and transient
response and high efficiency. This combination makes it
ideal for providing multiple low voltage logic supplies to
microprocessors or high density ASICs in systems using
a “2-step” regulation architecture, used in portable and
advanced desktop computers.
OVERVIEW
The LTC1702 is a dual, step-down (buck), voltage mode
feedback switching regulator controller. It is designed to
be used in a synchronous switching architecture with two
external N-channel MOSFETs per channel. It is intended to
operate from a low voltage input supply (7V maximum)
and provide a high power, high efficiency, precisely regu-
lated output voltage. Several features make it particularly
suited for microprocessor supply regulation. Output regu-
lation is extremely tight, with DC line and load regulation
and initial accuracy better than 1%, and total regulation
including transient response inside of 3% with a properly
designed circuit. The 550kHz switching frequency allows
the use of physically small, low value external components
without compromising performance.
The LTC1702’s internal feedback amplifier is a 25MHz
gain-bandwidth op amp, allowing the use of complex
multipole/zero compensation networks. This allows the
feedback loop to maintain acceptable phase margin at
higher frequencies than traditional switching regulator
APPLICATIO
S I
FOR
ATIO
U
W
U
U
V
CC
5V
5V
10k
2k
C
L
C
L
C
L
C
L
BOOST1
TG1
BG1
SW1
I
MAX1
FCB
PGOOD1
RUN/SS1
COMP1
FB1
LTC1702
BOOST2
TG2
BG2
SW2
I
MAX2
PGOOD2
FAULT
RUN/SS2
COMP2
FB2
0.1
μ
F
100
μ
F
V
PGOOD1
V
FB1
V
FB2
V
PGOOD2
V
FAULT
I
BOOST1
I
CC
I
PVCC
I
BOOST2
f
MEASURED
1702 TC
PV
CC
GND
PGND
+
2k
5V
10k
相關(guān)PDF資料
PDF描述
LTC1702IGN Dual 550kHz Synchronous 2-Phase Switching Regulator Controller
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LTC1706CS8-19 VID Voltage Programmer
LTC1706C-19 Circular Connector; Body Material:Aluminum; Series:PT06; No. of Contacts:18; Connector Shell Size:14; Connecting Termination:Crimp; Circular Shell Style:Straight Plug; Circular Contact Gender:Pin; Insert Arrangement:14-18
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1702IGN 功能描述:IC REG CTRLR BUCK PWM VM 24-SSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤(pán) 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱(chēng):LM1771SSDX
LTC1702IGN#PBF 功能描述:IC REG CTRLR BUCK PWM VM 24-SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤(pán) 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱(chēng):LM1771SSDX
LTC1702IGN#TR 功能描述:IC REG CTRLR BUCK PWM VM 24-SSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤(pán) 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱(chēng):LM1771SSDX
LTC1702IGN#TRPBF 功能描述:IC REG CTRLR BUCK PWM VM 24-SSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:PolyPhase® 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤(pán) 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱(chēng):LM1771SSDX
LTC1703CG 功能描述:IC REG SW DUAL SYNC VID 28SSOP RoHS:否 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專(zhuān)用型 系列:- 標(biāo)準(zhǔn)包裝:43 系列:- 應(yīng)用:控制器,Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:48-QFN(7x7) 包裝:管件