參數(shù)資料
型號(hào)： LTC3555EUFD#TR
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 3 A BATTERY CHARGE CONTROLLER, 2700 kHz SWITCHING FREQ-MAX, PQCC28
封裝： 4 X 5 MM, 0.75 MM HEIGHT, PLASTIC, MO-220WXXX, QFN-28
文件頁數(shù)： 1/32頁
文件大小： 295K
代理商： LTC3555EUFD#TR
LTC3555
1
3555f
■ HDD-Based MP3 Players, PDAs, GPS, PMPs
■ Other USB-Based Handheld Products
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
High Efciency USB Power
Manager + Triple
Step-Down DC/DC
The LTC
3555 is a highly integrated power management
and battery charger IC for Li-Ion/Polymer battery applica-
tions. It includes a high efciency current limited switching
PowerPath manager with automatic load prioritization, a
battery charger, an ideal diode and three general purpose
synchronous step-down switching regulators.
Designed specically for USB applications, the LTC3555’s
switching power manager automatically limits input cur-
rent to a maximum of either 100mA or 500mA for USB
applications or 1A for adapter-powered applications. Unlike
linear PowerPath controllers, the LTC3555’s switching input
stage transmits nearly all of the 2.5W available from the
USB port to the system load with minimal power wasted
as heat. This feature allows the LTC3555 to provide more
power to the application and eases the constraint of thermal
budgeting in small spaces.
Two of the three general purpose switching regulators can
provide up to 400mA and the third can deliver 1A. The entire
product can be controlled via I2C or simple I/O.
The LTC3555 is available in the 28-pin (4mm
× 5mm ×
0.75mm) QFN surface mount package.
High Efciency PowerPath Manager and Triple Step-Down Regulator
POWER MANAGER
■ High Efciency Switching PowerPathTM Controller
with Bat-TrackTM Adaptive Output Control
■ Programmable USB or Wall Current Limit
(100mA/500mA/1A)
■ Full Featured Li-Ion/Polymer Battery Charger
■ 1.5A Maximum Charge Current
■ Internal 180m
Ω Ideal Diode + External Ideal Diode
Controller Powers Load in Battery Mode
■ Low No-Load Quiescent Current when Powered from
BAT (<30μA)
DC/DCs
■ Triple High Efciency Step-Down DC/DCs
(1A/400mA/400mA IOUT)
■ All Regulators Operate at 2.25MHz
■ Dynamic Voltage Scaling on Two Outputs
■ I2C or Independent Enable, VOUT Controls
■ Low No-Load Quiescent Current: 20μA
■ 28-Pin (4mm
× 5mm × 0.75mm) QFN Surface
Mount Package
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
PowerPath 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 and 6404251
Li-Ion
0.8V TO 3.6V/400mA
3.3V/25mA
0.8V TO 3.6V/400mA
0.8V TO 3.6V/1A
RST
2
OPTIONAL
0V
T
TO OTHER
LOADS
+
LTC3555
TRIPLE
HIGH EFFICIENCY
STEP-DOWN
SWITCHING
REGULATORS
I2C PORT
ALWAYS ON LDO
MEMORY
RTC/LOW
POWER LOGIC
I2C
CORE
I/O
3555 TA01
μPROCESSOR
USB/WALL
4.35V TO 5.5V
CHARGE
ENABLE
CONTROLS
USB COMPLIANT
STEP-DOWN
REGULATOR
CC/CV
BATTERY
CHARGER
5
1
2
3
IOUT (A)
0.01
0
EFFICIENCY
(%)
20
40
60
80
0.1
1
3555 TA01b
100
10
30
50
70
90
BAT = 4.2V
BAT = 3.3V
VBUS = 5V
IBAT = 0mA
10x MODE
Switching Regulator Efciency to
System Load (POUT/PBUS)
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC3555EUFD-TRPBF 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency USB Power Manager + Triple Step-Down DC/DC
LTC3555IUFD#PBF 功能描述:IC USB POWER MANAGER 28-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 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 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 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:LP3905SD-30DKR
LTC3555IUFD#TRPBF 功能描述:IC USB POWER MANAGER 28-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 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 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 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:LP3905SD-30DKR
LTC3555IUFD-1#PBF 功能描述:IC USB POWER MANAGER 28-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 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 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 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:LP3905SD-30DKR
LTC3555IUFD-1#TRPBF 功能描述:IC USB POWER MANAGER 28-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 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 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 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:LP3905SD-30DKR
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