參數(shù)資料
型號(hào)： LTC3554EUD#TRPBF
廠(chǎng)商： LINEAR TECHNOLOGY CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.6 A BATTERY CHARGE CONTROLLER, 2590 kHz SWITCHING FREQ-MAX, PQCC20
封裝： 3 X 3 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-20
文件頁(yè)數(shù)： 1/36頁(yè)
文件大?。?/td> 418K
代理商： LTC3554EUD#TRPBF
LTC3554/LTC3554-2
1
35542fb
TYPICAL APPLICATION
DESCRIPTION
Micropower USB Power
Manager with Li-Ion Charger
and Two Step-Down Regulators
TheLTC3554/LTC3554-2aremicropower,highlyintegrated
power management and battery charger ICs for single-cell
Li-Ion/Polymer battery applications. They include a
PowerPath manager with automatic load prioritization,
a battery charger, an ideal diode and numerous internal
protection features. Designed specically for USB applica-
tions, the LTC3554/LTC3554-2 power managers automati-
cally limit input current to a maximum of either 100mA or
500mA. Battery charge current is automatically reduced
such that the sum of the load current and the charge
current does not exceed the selected input current limit.
The LTC3554/LTC3554-2 also include two synchronous
step-down switching regulators as well as a pushbutton
controller. With all supplies enabled in standby mode, the
quiescent current drawn from the battery is only 10μA.
The LTC3554/LTC3554-2 are available in a 3mm
× 3mm
× 0.75mm 20-pin QFN package.
Battery Drain Current
vs Temperature
FEATURES
APPLICATIONS
n 10μA Standby Mode Quiescent Current (All Outputs On)
n Seamless Transition Between Input Power Sources:
Li-Ion/Polymer Battery and USB
n 240mΩ Internal Ideal Diode Provides Low Loss
PowerPath
n Dual High Efciency Step-Down Switching Regulators
(200mA IOUT) with Adjustable Output Voltages
n Pushbutton On/Off Control with System Reset
n Reset Time: 5 sec (LTC3554), 14 sec (LTC3554-2)
n Full Featured Li-Ion/Polymer Battery Charger
n Programmable Charge Current with Thermal Limiting
n Instant-On Operation with Discharged Battery
n 3mm
× 3mm × 0.75mm 20-Pin QFN Package
n USB-Based Handheld Products
n Portable Li-Ion/Polymer Based Electronic Devices
n Wearable Computers
n Low Power Medical Devices
VBUS
NTC
PROG
HPWR
SUSP
PWR_ON1
FSEL
STBY
PGOOD
PWR_ON2
PBSTAT
ON
VOUT
CHRG
BAT
BVIN
SW1
FB1
SW2
FB2
ON/OFF
Li-Ion
BATTERY
100k
T
1.87k
10pF
10μF
2.2μF
2.05M
649k
3.3V
200mA
4.7μH
10pF
10μF
332k
649k
1.2V
200mA
3554 TA01a
10μH
SYSTEM
LOAD
4.35V TO 5.5V
USB INPUT
LTC3554
+
10μF
TEMPERATURE (°C)
–75 –50 –25
25
50
75
100 125
0
BA
TTER
Y
DRAIN
CURRENT
(μA)
4
6
10
14
12
8
3554 TA01b
2
BOTH REGULATORS DISABLED
ONE REGULATOR ENABLED
HARD RESET
BOTH REGULATORS
ENABLED
VBAT = 3.8V
STBY = 3.8V
REGULATORS LOAD = 0mA
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
and PowerPath, Hot Swap and Bat-Track are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 6522118, 6700364, 5481178, 6304066, 6570372, 6580258, 7511390.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3555 制造商:LINER 制造商全稱(chēng):Linear Technology 功能描述:High Effi ciency USB Power Manager + Triple Step-Down DC/DC
LTC3555EUFD#PBF 功能描述:IC USB POWER HE 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源管理 - 專(zhuān)用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱(chēng):LP3905SD-30DKR
LTC3555EUFD#TRPBF 功能描述:IC USB POWER HE 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源管理 - 專(zhuān)用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱(chēng):LP3905SD-30DKR
LTC3555EUFD-1#PBF 功能描述:IC USB POWER HE 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源管理 - 專(zhuān)用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱(chēng):LP3905SD-30DKR
LTC3555EUFD-1#TRPBF 功能描述:IC USB POWER HE 28-QFN RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 電源管理 - 專(zhuān)用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動(dòng)設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱(chēng):LP3905SD-30DKR
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