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參數資料
| 型號： | LTC3456 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 2-Cell, Multi-Output DC/DC Converter with USB Power Manager |
| 中文描述： | 2節(jié)電池，多輸出DC / DC轉換器與USB電源管理器 |
| 文件頁數： | 10/28頁 |
| 文件大?。?/td> | 358K |
| 代理商： | LTC3456 |
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10
LTC3456
3456f
HSO (Pin 17):
Hot Swap Output. An internal 0.8
current
limited PMOS switch connects this pin to the V
INT
pin
0.5ms after the core voltage comes into regulation. The
nominal voltage at this pin is 3.3V. It is short-circuit
protected and the current out of this pin is limited to
120mA (typ).
SUSPEND (Pin 18):
USB Suspend Pin. Pull this pin high
to disable all USB functionality. The USB switch connected
between USB and V
EXT
behaves like a back-to-back diode
whenever SUSPEND is pulled high. In Suspend mode the
device limits the current drawn from the USB port to
100
μ
A (typ).
PWRKEY (Pin 19):
Power ON/OFF Key. Connecting this
pin to GND will turn on the IC. This pin is typically used with
a momentary-on pushbutton switch to turn on the LTC3456.
This pin must be held low until the PWRON pin is pulled
high (usually from a microprocessor) in order to keep the
IC turned on. This pin has a 400k pull-up resistor to V
MAX
.
PBSTAT (Pin 20):
Power ON/OFF Key Status Pin. This
open-drain output pin indicates the state of the PWRKEY
pin to the microcontroller. The pin output follows the state
of the PWRKEY pin (PBSTAT goes low when PWRKEY is
pulled low).
PWRON (Pin 21):
Power On Pin. When pulled high this
microprocessor controlled pin turns on the IC. This pin
has a weak 1
μ
A pull-down current source.
PIU
MODE (Pin 22):
Burst Mode Select Pin. Tie this pin high to
allow automatic Burst Mode operation. Burst Mode opera-
tion will provide superior efficiency when any of the
outputs are operating with very low output currents. Tie
this pin low to force PWM operation under all load current
conditions. The device operates in forced PWM mode
when powered from USB or wall input (irrespective of the
state of the MODE pin). Furthermore, at initial power-up,
the device operates in forced PWM mode during the
262ms internal delay timeout. This pin has a weak 1
μ
A
pull-down current source.
RESET (Pin 23):
Fault Indicator Output Pin. This open-
drain output is active both at power-up and power-down.
RESET is held low at initial power up. When both the Core
and Main outputs come into regulation, an internal reset
delay timer is activated. RESET is released at the end of the
262ms timeout. If either Main or Core outputs fall out of
regulation during normal operation, RESET is pulled low.
Also, RESET is pulled low at power-off to prevent spurious
turn-on of the microprocessor.
FB1 (Pin 24):
Feedback Pin for the Core Regulator. The
regulator drives the voltage at this pin to 0.8V. Connect the
resistor divider tap to this pin. The output voltage of the
core regulator can be adjusted from 0.8V to V
BATT(MIN)
.
Exposed Pad (Pin 25):
The Exposed Pad must be soldered
to the PCB system ground.
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| LTC3456EUF | 制造商:Linear Technology 功能描述:Power Management System 24-Pin QFN EP |
| LTC3456EUF#PBF | 功能描述:IC CONV DC/DC USB BATT 24-QFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標準包裝:1 系列:- 應用:手持/移動設備 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 供應商設備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LTC3456EUF#TRPBF | 功能描述:IC CONV DC/DC USB BATT 24-QFN RoHS:否 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標準包裝:1 系列:- 應用:手持/移動設備 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 供應商設備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LTC3458 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:1.7A, 1.5MHz Synchronous Step-Up DC/DC Converter with Output Disconnect |
| LTC3458EDE | 功能描述:IC REG BOOST SYNC ADJ 1.4A 12DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數:1 輸出電壓:1.2V，1.5V，1.8V，2.5V 輸入電壓:2.7 V ~ 20 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:50mA 同步整流器:是 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬）裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:10-MSOP 裸露焊盤 |
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