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參數(shù)資料
| 型號： | LTC3586EUFE#PBF |
| 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, PQCC38 |
| 封裝： | 4 X 6 MM, 0.75 MM HEIGHT, LEAD FREE, PLASTIC, QFN-38 |
| 文件頁數(shù)： | 8/36頁 |
| 文件大小： | 317K |
| 代理商： | LTC3586EUFE#PBF |
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LTC3586/LTC3586-1
16
3586fa
OPERATION
Suspend LDO
If the LTC3586/LTC3586-1 are congured for USB suspend
mode, the switching regulator is disabled and the suspend
LDO provides power to the VOUT pin (presuming there is
power available to VBUS). This LDO will prevent the bat-
tery from running down when the portable product has
access to a suspended USB port. Regulating at 4.6V, this
LDO only becomes active when the switching converter
is disabled (Suspended). To remain compliant with the
USB specication, the input to the LDO is current limited
so that it will not exceed the 500μA low power suspend
specication. If the load on VOUT exceeds the suspend
current limit, the additional current will come from the
battery via the ideal diode.
3.3V Always-On Supply
The LTC3586/LTC3586-1 include a low quiescent current
low dropout regulator that is always powered. This LDO
can be used to provide power to a system pushbutton
controller, standby microcontroller or real-time clock. De-
signed to deliver up to 20mA, the always-on LDO requires
at least a 1μF low impedance ceramic bypass capacitor
for compensation. The LDO is powered from VOUT, and
therefore will enter dropout at loads less than 20mA as
VOUT falls near 3.3V. If the LDO3V3 output is not used, it
should be disabled by connecting it to VOUT.
VBUS Undervoltage Lockout (UVLO)
An internal undervoltage lockout circuit monitors VBUS and
keeps the PowerPath switching regulator off until VBUS
rises above 4.30V and is about 200mV above the battery
voltage. Hysteresis on the UVLO turns off the regulator if
VBUS drops below 4.00V or to within 50mV of BAT. When
this happens, system power at VOUT will be drawn from
the battery via the ideal diode.
Battery Charger
The LTC3586/LTC3586-1 include a constant-current/con-
stant-voltage battery charger with automatic recharge,
automatic termination by safety timer, low voltage trickle
charging, bad cell detection and thermistor sensor input
for out-of-temperature charge pausing.
Battery Preconditioning
When a battery charge cycle begins, the battery charger
rst determines if the battery is deeply discharged. If the
battery voltage is below VTRKL,typically2.85V,anautomatic
trickle charge feature sets the battery charge current to
10% of the programmed value. If the low voltage persists
for more than 1/2 hour, the battery charger automatically
terminates and indicates via the CHRG pin that the battery
was unresponsive.
+
–
+
–
0.3V
1.188V
3.6V
CLPROG
ISWITCH/
hCLPROG
+ –
+
–
15mV
IDEAL
DIODE
PWM AND
GATE DRIVE
AVERAGE INPUT
CURRENT LIMIT
CONTROLLER
AVERAGE OUTPUT
VOLTAGE LIMIT
CONTROLLER
CONSTANT-CURRENT
CONSTANT-VOLTAGE
BATTERY CHARGER
+
–
4
GATE
31
VOUT
34
SW
3.5V TO
(BAT + 0.3V)
TO SYSTEM
LOAD
OPTIONAL
EXTERNAL
IDEAL DIODE
PMOS
SINGLE CELL
Li-Ion
3586 F03
37
BAT
32
VBUS
TO USB
OR WALL
ADAPTER
35, 36
+
Figure 3. PowerPath Block Diagram
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC3586EUFE-1#PBF | BATTERY CHARGE CONTROLLER, PQCC38 |
| LTC3586EUFE-1#TRPBF | BATTERY CHARGE CONTROLLER, PQCC38 |
| LTC3672BEDC-1#PBF | 1.1 A SWITCHING REGULATOR, 2700 kHz SWITCHING FREQ-MAX, PDSO8 |
| LTC3728LZEUH | 3 A DUAL SWITCHING CONTROLLER, 590 kHz SWITCHING FREQ-MAX, PQCC28 |
| LTC3773EUHF | SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PQCC38 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC3586EUFE-TRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Effi ciency USB Power Manager with Boost, Buck-Boost and Dual Bucks |
| LTC3588-1 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Ultralow Voltage Step-Up Converter |
| LTC3588-2 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:400mA Step-Up DC/DC Converter with Maximum Power Point Control and 250mV Start-Up |
| LTC3588-2_10 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Piezoelectric Energy Harvesting Power Supply with 14V Minimum VIN |
| LTC3588EDD-1#PBF | 功能描述:IC ENERGY HARVESTING PSU 10DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 應(yīng)用:熱電冷卻器 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:28-SOIC（0.173"，4.40mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:28-TSSOP 裸露焊盤 包裝:管件 產(chǎn)品目錄頁面:1410 (CN2011-ZH PDF) |
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