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| 型号： | LTC3809EDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 10-DFN |
| 标准包装： | 121 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 825kHz |
| 占空比： | 100% |
| 电源电压： | 2.75 V ~ 9.8 V |
| 降压： | 是 |
| 升压： | 无 |
| 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 ~ 85°C |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 产品目录页面： | 1336 (CN2011-ZH PDF) |
LTC3809
ELECTRICAL CHARACTERISTICS The l denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 4.2V unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Main Control Loops
Input DC Supply Current
(Note 4)
Normal Operation
Sleep Mode
350
105
500
150
μA
μA
Shutdown
UVLO
RUN = 0V
V IN = UVLO Threshold – 200mV
9
3
20
10
μA
μA
Undervoltage Lockout Threshold (UVLO)
Shutdown Threshold of RUN Pin
Regulated Feedback Voltage
Output Voltage Line Regulation
Output Voltage Load Regulation
V IN Falling
V IN Rising
(Note 5)
2.75V < V IN < 9.8V (Note 5)
I TH = 0.9V (Note 5)
l
l
l
1.95
2.15
0.8
0.591
2.25
2.45
1.1
0.6
0.01
0.1
2.55
2.75
1.4
0.609
0.04
0.5
V
V
V
V
%/V
%
I TH = 1.7V
–0.1
–0.5
%
V FB Input Current
(Note 5)
9
50
nA
Overvoltage Protect Threshold
Measured at V FB
0.66
0.68
0.7
V
Overvoltage Protect Hysteresis
20
mV
Auxiliary Feedback Threshold
Top Gate (TG) Drive Rise Time
Top Gate (TG) Drive Fall Time
Bottom Gate (BG) Drive Rise Time
Bottom Gate (BG) Drive Fall Time
C L = 3000pF
C L = 3000pF
C L = 3000pF
C L = 3000pF
0.325
0.4
40
40
50
40
0.475
V
ns
ns
ns
ns
Maximum Current Sense Voltage ( Δ V SENSE(MAX) )
(V IN – SW)
Soft-Start Time (Internal)
IPRG = Floating (Note 6)
IPRG = 0V (Note 6)
IPRG = V IN (Note 6)
Time for V FB to Ramp from 0.05V to 0.55V
l
l
l
110
70
185
0.5
125
85
204
0.74
140
100
223
0.9
mV
mV
mV
ms
Oscillator and Phase-Locked Loop
Oscillator Frequency
Unsynchronized (SYNC/MODE Not Clocked)
PLLLPF = Floating
PLLLPF = 0V
PLLLPF = V IN
480
260
650
550
300
750
600
340
825
kHz
kHz
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
Sourcing
Spread Spectrum Frequency Range
SYNC/MODE Pull-Down Current
f OSC > f SYNC/MODE
f OSC < f SYNC/MODE
Minimum Switching Frequency
Maximum Switching Frequency
SYNC/MODE = 2.2V
–3
3
460
635
2.6
μA
μA
kHz
kHz
μA
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3809E is guaranteed to meet speci?ed performance from
0°C to 85°C. Speci?cations over the –40°C to 85°C operating range are
assured by design characterization, and correlation with statistical process
controls.
Note 3: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
T J = T A + (P D ? θ JA °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 I TH to a
speci?ed voltage and measures the resultant V FB voltage.
Note 6: Peak current sense voltage is reduced dependent on duty cycle to
a percentage of value as shown in Figure 1.
3809fc
3
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| 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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