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参数资料
| 型号： | LTC3809EMS |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 825 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | PLASTIC, MSOP-10 |
| 文件页数： | 18/24页 |
| 文件大小： | 266K |
| 代理商： | LTC3809EMS |
3
LTC3809
3809f
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
The
● indicates specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 4.2V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC3809E is guaranteed to meet specified performance from
0
°C to 70°C. Specifications over the –40°C to 85°C operating range are
assured by design characterization, and correlation with statistical process
controls.
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formula:
TJ = TA + (PD θJA °C/W)
Note 4: Dynamic supply current is higher due to gate charge being
delivered at the switching frequency.
Note 5: The LTC3809 is tested in a feedback loop that servos ITH to a
specified voltage and measures the resultant VFB voltage.
Note 6: Peak current sense voltage is reduced dependent on duty cycle to
a percentage of value as shown in Figure 1.
Overvoltage Protect Hysteresis
20
mV
Auxiliary Feedback Threshold
0.325
0.4
0.475
V
Top Gate (TG) Drive Rise Time
CL = 3000pF
40
ns
Top Gate (TG) Drive Fall Time
CL = 3000pF
40
ns
Bottom Gate (BG) Drive Rise Time
CL = 3000pF
50
ns
Bottom Gate (BG) Drive Fall Time
CL = 3000pF
40
ns
Maximum Current Sense Voltage (
VSENSE(MAX))
IPRG = Floating (Note 6)
●
110
125
140
mV
(SENSE+ – SW)
IPRG = 0V (Note 6)
●
70
85
100
mV
IPRG = VIN (Note 6)
●
185
204
223
mV
Soft-Start Time (Internal)
Time for VFB to Ramp from 0.05V to 0.55V
0.5
0.74
0.9
ms
Oscillator and Phase-Locked Loop
Oscillator Frequency
Unsynchronized (SYNC/MODE Not Clocked)
PLLLPF = Floating
480
550
600
kHz
PLLLPF = 0V
260
300
340
kHz
PLLLPF = VIN
650
750
825
kHz
Phase-Locked Loop Lock Range
SYNC/MODE Clocked
Minimum Synchronizable Frequency
200
250
kHz
Maximum Synchronizible Frequency
750
1000
kHz
Phase Detector Output Current
Sinking
fOSC > fSYNC/MODE
–3
A
Sourcing
fOSC < fSYNC/MODE
3
A
Spread Spectrum Frequency Range
Minimum Switching Frequency
460
kHz
Maximum Switching Frequency
635
kHz
SYNC/MODE Pull-Down Current
SYNC/MODE = 2.2V
2.6
A
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3809EMSE | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3809EMSE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3809EMSE#TR | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3809EMSE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3809EMSE-1 | 功能描述:IC REG CTRLR BUCK PWM CM 10-MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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