參數(shù)資料
型號： LT1307
廠商： Linear Technology Corporation
英文描述： Micropower 600kHz PWM DC/DC Converters(微功耗,600MHz,脈寬調(diào)制電流模式DC/DC變換器)
中文描述： 微600kHz的PWM直流/直流轉(zhuǎn)換器（微功耗，頻率600MHz，脈寬調(diào)制電流模式的DC / DC變換器）
文件頁數(shù)： 15/20頁
文件大?。?/td> 317K
代理商： LT1307
15
LT1307/LT1307B
TYPICAL APPLICATIO
S
N
U
Externally Controlled Burst Mode Operation
This circuit overcomes the limitation of load-based
transitioning between Burst Mode operation and constant
switching mode by adding external control. If M1’s gate is
grounded by an external open-drain signal, the converter
functions normally in constant switching mode, delivering
3.3V. Output noise is low, however efficiency at loads less
than 1mA is poor due to the 1mA supply current of the
LT1307B. If M1’s gate is allowed to float, the low-battery
detector now drives the V
C
pin. R3 and R2 set the output
to 3V by allowing M1’s gate to go to V
OUT
until the output
voltage drops below 3V. R1 adds hysteresis, resulting in
low-frequency Burst Mode operation ripple voltage at the
output. By pulling the V
C
pin below a V
BE
, quiescent
current of the LT1307B drops to 60
μ
A, resulting in accept-
able efficiency at loads in the 100
μ
A range.
V
IN
V
C
SW
FB
LBO
SHDN
LBI
GND
LT1307B
L1
10
μ
H
MBR0520
100k
2
CELLS
1nF
1
μ
F
CERAMIC
1307 F19
C2*
10
μ
F
CERAMIC
R3
698k
R4
1M
R2
499k
R5
590k
R1
10M
+
C1
100
μ
F
V
3.3V
200mA
300k
V
OUT
M1
2N7002
GROUND = HIGH POWER/LOW NOISE
FLOAT = Burst Mode OPERATION
SHUTDOWN
3.0V IN LOW-POWER
Burst Mode OPERATION
C1 =VX TPSC107K006R0150
L1 =OILCRAFT DO1608-103
SUMIDA CD43-100
C2 OPTIONAL: REDUCES OUTPUT
RIPPLE CAUSED BY C1'S ESR
*
0.2s/DIV
1307 F20
This photo details output voltage as the circuit is switched
between the two modes. Load current is 100
μ
A in Burst
Mode operation; 10mA in constant switching mode.
This photo shows transient response in constant switch-
ing mode with a 10mA to 100mA stepped load. Output
ripple at the switching frequency can be reduced consid-
erably by adding a 10
μ
F ceramic capacitor in parallel with
the 100
μ
F tantalum.
10mA
100
μ
A
I
L
V
500mV/DIV
2ms/DIV
1307 F21
V
100mV/DIV
100mA
10mA
I
L
相關(guān)PDF資料
PDF描述
LT1307B Micropower 600kHz PWM DC/DC Converters(微功耗,600MHz,脈寬調(diào)制電流模式DC/DC變換器)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1307B 制造商:LINER 制造商全稱:Linear Technology 功能描述:Single Cell Micropower 600kHz PWM DC/DC Converters
LT1307BCMS8 功能描述:IC REG BOOST 3.3V/5V 0.1A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應商設(shè)備封裝:8-SOIC
LT1307BCMS8#PBF 功能描述:IC REG BOOST 3.3V/5V 0.1A 8MSOP 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:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 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:6-UFDFN 包裝:帶卷 (TR) 供應商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2
LT1307BCMS8#PBF 制造商:Linear Technology 功能描述:DC-DC CONVERTER BOOST 600KHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BOOST, 600KHZ, 600mA, M
LT1307BCMS8#TR 功能描述:IC REG BOOST 3.3V/5V 0.1A 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應商設(shè)備封裝:8-SOIC
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