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| 型号： | LTC1872ES6#TR |
| 厂商： | Linear Technology |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST PWM CM SOT23-6 |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 650kHz |
| 电源电压： | 2.5 V ~ 9.8 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 ~ 85°C |
| 封装/外壳： | SOT-23-6 |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC1872CS6#TR LTC1872CS6TR LTC1872CS6TR-ND LTC1872ES6TR |
LTC1872
ABSOLUTE M AXI M U M RATINGS
(Note 1)
PACKAGE/ORDER I N FOR M ATIO N
Input Supply Voltage (V IN )......................... – 0.3V to 10V
SENSE – , NGATE Voltages ............ – 0.3V to (V IN + 0.3V)
V FB , I TH /RUN Voltages .............................. – 0.3V to 2.4V
NGATE Peak Output Current (< 10 μ s) ....................... 1A
Storage Ambient Temperature Range ... – 65 ° C to 150 ° C
Operating Temperature Range (Note 2) .. – 40 ° C to 85 ° C
Junction Temperature (Note 3) ............................. 150 ° C
Lead Temperature (Soldering, 10 sec).................. 300 ° C
TOP VIEW
I TH /RUN 1 6 NGATE
GND 2 5 V IN
V FB 3 4 SENSE –
S6 PACKAGE
6-LEAD PLASTIC SOT-23
T JMAX = 150 ° C, θ JA = 230 ° C/ W
ORDER PART
NUMBER
LTC1872ES6
S6 PART MARKING
LTMK
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T A = 25 ° C. V IN = 4.2V unless otherwise specified. (Note 2)
PARAMETER
Input DC Supply Current
Normal Operation
Sleep Mode
Shutdown
UVLO
CONDITIONS
Typicals at V IN = 4.2V (Note 4)
2.4V ≤ V IN ≤ 9.8V
2.4V ≤ V IN ≤ 9.8V
2.4V ≤ V IN ≤ 9.8V, V ITH /RUN = 0V
V IN < UVLO Threshold
MIN
TYP
270
230
8
6
MAX
420
370
22
10
UNITS
μ A
μ A
μ A
μ A
Undervoltage Lockout Threshold
V IN Falling
V IN Rising
q
1.55
1.85
2.00
2.10
2.35
2.40
V
V
Shutdown Threshold (at I TH /RUN)
Start-Up Current Source
V ITH /RUN = 0V
q
0.15
0.25
0.35
0.5
0.55
0.85
V
μ A
Regulated Feedback Voltage
V FB Input Current
Oscillator Frequency
0 ° C to 70 ° C(Note 5)
– 40 ° C to 85 ° C(Note 5)
(Note 5)
V FB = 0.8V
q
q
0.780
0.770
500
0.800
0.800
10
550
0.820
0.830
50
650
V
V
nA
kHz
Gate Drive Rise Time
Gate Drive Fall Time
C LOAD = 3000pF
C LOAD = 3000pF
40
40
ns
ns
Peak Current Sense Voltage
(Note 6)
114
120
mV
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1872E is guaranteed to meet performance specifications
from 0 ° C to 70 ° C. Specifications over the – 40 ° C to 85 ° C operating
temperature 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)
2
Note 4: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
Note 5: The LTC1872 is tested in a feedback loop that servos V FB to the
output of the error amplifier.
Note 6: Guaranteed by design at duty cycle = 30%. Peak current sense
voltage is V REF /6.67 at duty cycle <40%, and decreases as duty cycle
increases due to slope compensation as shown in Figure 2.
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| LTC1872ES6TRMPBF | 制造商:Linear Technology 功能描述:DC-DC Controller Step-Up 2.5-9.8V TSOT23 |
| LTC1873EG | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP 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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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 ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC1873EG#PBF | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP 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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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 ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LTC1873EG#TR | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP 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:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 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 ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
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