參數(shù)資料
型號(hào)： LTC3802EUH
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking
中文描述： DUAL SWITCHING CONTROLLER, 850 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 5 X 5 MM, PLASTIC, MO-220WHHD, QFN-32
文件頁數(shù)： 1/28頁
文件大?。?/td> 346K
代理商： LTC3802EUH
LTC3802
1
3802f
I
Wide V
IN
Range: 3V to 30V Operation with Line
Feedforward Compensation
I
Leading Edge Modulation Architecture for
Extremely Low Duty Cycle Operation
I
Phase-Lockable Fixed Frequency: 330kHz to 750kHz
I
Two 180
°
Out-of-Phase Controllers
I
Fast Programmable Power-Up/-Down Tracking
I
Programmable Current Limit Without External
Current Sense Resistor
I
Optional Burst Mode
Operation at Light Load
I
±
1% 0.6V Voltage Reference
I
External N-Channel MOSFET Architecture
I
Low Shutdown Current: <100
μ
A
I
Overvoltage Protection and PGOOD Flag
I
Small 28-Lead SSOP and 32-Lead QFN Packages
APPLICATIU
Dual 550kHz Synchronous
2-Phase DC/DC Controller with
Programmable Up/Down Tracking
I
Notebook and Palmtop Computers
I
Portable Instruments
I
Battery-Operated Digital Devices
I
DC Power Distribution Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
U.S. Patent Nos 5481178, 5846544, 6304066, 6580258, 5055767, 6307356
The LTC
3802 is a dual switching regulator controller
optimized for high efficiency step-down conversion from
input voltages between 3V to 30V. The controller uses a
leading edge modulation scheme to allow extremely low
duty cycle operation. The constant frequency voltage mode
controller allows a phase-lockable frequency between
330kHz and 750kHz. Power loss and noise due to the ESR
of the input capacitors are minimized by operating the two
controller output stages 180
°
out of phase. The synchro-
nous buck architecture automatically shifts to Burst Mode
operation as the output load decreases, ensuring maxi-
mum efficiency over a wide range of load currents.
The LTC3802 features an onboard, trimmed 0.6V refer-
ence and provides better than 1% regulation at the con-
verter outputs. A separate output sense provides real time
overvoltage protection and PGOOD sensing. An FBT pin
programs the power-up/-down tracking between the two
channels to meet various sequencing requirements. A
RUN/SS pin provides soft-start and externally program-
mable current limit protection functions.
DESCRIPTIOU
FEATURES
TYPICAL APPLICATIO
U
TG2
BOOST2
SW2
BG2
PLLIN
PLLLPF
I
MAX2
CMPIN2
V
CC
COMP2
FB2
PHASEMD
PGOOD
V
INFF
+
+
PV
CC
0.1
μ
F
0.1
μ
F
10
μ
F
CMDSH-3
Si7860DP
×
2
Si7860DP
×
2
4.7
μ
F
25V
×
8
Si7440DP
×
2
5V
CMDSH-3
2200pF
1500pF
560pF
330pF
15k
47k
47k
10k
5V
10
10
μ
F
2200pF
390
15k
5V
390
TG1
BOOST1
SW1
BG1
PGND
I
MAX1
FBT
CMPIN1
COMP1
FB1
SGND
FCB
RUN/SS
0.1
μ
F
B340B
B340B
330
μ
F
1
μ
H
+
330
μ
F
4V
×
3
56
μ
F
25V
×
2
V
OUT1
15A
V
IN
5V TO 22V
10k
10k
2.21k
2.21k
0.47
μ
F
V
IN
Si7440DP
×
2
1
μ
H
4V
×
3
10k
10k
V
2.5V
15A
3802 TA01
3.16k
3.16k
+
330pF
560pF
1500pF
0.1
μ
F
LTC3802
+
相關(guān)PDF資料
PDF描述
LTC3802EGN Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking
LTC3802 16-Bit Buffer/Driver With 3-State Outputs 48-TSSOP -40 to 85
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3802EUH#PBF 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:是 類別: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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3802EUH#TR 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:否 類別: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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3802EUH#TRPBF 功能描述:IC REG CTRLR BUCK PWM VM 32-QFN RoHS:是 類別: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 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC3803ES6 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Flyback Controller 9.2V to 75V Input 6-Pin TSOT-23
LTC3803ES6#PBF 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Flyback Controller 6-Pin TSOT-23 Bulk 制造商:Linear Technology 功能描述:IC, DC-DC CONV; Primary Input Voltage:8V; No. of Outputs:1; Output Current:1A; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:125C; MSL:MSL 1 - Unlimited; Leaded Process Compatible:Yes ;RoHS Compliant: Yes
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