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參數(shù)資料
| 型號： | LTC3113EFE#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 16 A SWITCHING REGULATOR, 2000 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 4.40 MM, LEAD FREE, PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 2/24頁 |
| 文件大?。?/td> | 383K |
| 代理商： | LTC3113EFE#PBF |
LTC3113
10
3113f
OPERATION
Internal Soft-Start
The LTC3113 buck-boost converter has an independent
internal soft-start circuit with a nominal duration of 2ms.
The converter remains in regulation during soft-start and
will therefore respond to output load transients which occur
during this time. In addition, the output voltage rise time
has minimal dependency on the size of the output capaci-
tor or load current during start-up. During soft-start, the
buck-boost is forced into PWM mode operation regardless
of the state of the BURST pin.
Thermal Shutdown
If the die temperature exceeds 155°C the LTC3113 buck-
boost converter will be disabled. All power devices are
turned off and the switch nodes will be forced into a high
impedance state. The soft-start circuit for the converter
is reset during thermal shutdown to provide a smooth
recovery once the overtemperature condition is eliminated.
When the die temperature drops to approximately 145°C
the LTC3113 will restart. For recommendations regarding
thermal design of the LTC3113 PCB, refer to the PCB Ther-
mal Considerations section in Applications Information.
Undervoltage Lockout
If the supply voltage decreases below 1.6V (typical) then
the LTC3113 buck-boost converter will be disabled and
all power devices are turned off. The soft-start circuit is
reset during undervoltage lockout to provide a smooth
restart once the input voltage rises above 1.7V (typical)
the undervoltage lockout increasing threshold.
When operating the LTC3113 at low input voltages, care
must be taken under heavy loads to prevent the part from
cycling into and out of UVLO. When operating at low input
voltages the voltage drop created by the source resistance
can trigger the UVLO, resetting the part. Operation near the
undervoltage lockout is not recommended, but if require-
ments dictate, the source resistance should be less than
100mV/IIN(MAX) (where IIN(MAX) is the maximum input
current) to ensure proper operation.
Inductor Damping
When the LTC3113 is in burst operation and sleep mode,
active circuits “damp” the inductor voltage through 165Ω
(typical) impedance from both SW1 and SW2 to ground
minimizing EMI.
PWM Mode Operation
When the BURST pin is held low, the LTC3113 buck-
boost converter operates in a xed-frequency pulse width
modulation (PWM) mode using voltage mode control. Full
output current is only available in PWM mode. A proprietary
switching algorithm allows the converter to transition
between buck, buck-boost, and boost modes without
discontinuity in inductor current. The switch topology for
the buck-boost converter is shown in Figure 1.
Figure 1. Buck-Boost Switch Topology
A
B
D
C
3113 F01
L
VIN
VOUT
When the input voltage is signicantly greater than the
output voltage, the buck-boost converter operates in
buck mode. Switch D turns on continuously and switch
C remains off. Switches A and B are pulse width modu-
lated to produce the required duty cycle to support the
output regulation voltage. As the input voltage decreases,
switch A remains on for a larger portion of the switching
cycle. When the duty cycle reaches approximately 85%,
the switch pair AC begins turning on for a small fraction
of the switching period. As the input voltage decreases
further, the AC switch pair remains on for longer durations
and the duration of the BD phase decreases proportionally.
As the input voltage drops below the output voltage, the
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| LTC3113IDHD#PBF | 功能描述:IC REG BUCK BOOST ADJ 3A 16DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3113IDHD#TRPBF | 功能描述:IC REG BUCK BOOST ADJ 3A 16DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3113IFE#PBF | 功能描述:IC REG BUCK BOOST ADJ 3A 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3113IFE#TRPBF | 功能描述:IC REG BUCK BOOST ADJ 3A 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3115-1 | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:40V, 2A Synchronous Buck-Boost DC/DC Converter |
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