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| 型号： | LTC1701ES5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.5A TSOT23-5 |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 1MHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | TSOT-23-5 |
LTC1701/LTC1701B
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
(Voltages Referred to GND Pin)
V IN Voltage (Pin 5)....................................... – 0.3V to 6V
I TH /RUN Voltage (Pin 4) .............................. – 0.3V to 3V
V FB Voltage (Pin 3) ...................................... – 0.3V to 3V
V IN – SW (Max Switch Voltage) ................8.5V to – 0.3V
Operating Temperature Range (Note 2) .. – 40 ° C to 85 ° C
Junction Temperature (Note 5) ............................. 125 ° C
Storage Temperature Range ................. – 65 ° C to 150 ° C
Lead Temperature (Soldering, 10 sec).................. 300 ° C
TOP VIEW
SW 1 5 V IN
GND 2
V FB 3 4 I TH /RUN
S5 PACKAGE
5-LEAD PLASTIC SOT-23
T JMAX = 125 ° C, θ JA = 250 ° C/W
SEE THE APPLICATION
INFORMATION SECTION
ORDER PART
NUMBER
LTC1701ES5
LTC1701BES5
S5 PART
MARKING
LTKG
LTUD
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 3.3V, R ITH/RUN = 1Meg (from V IN to I TH /RUN) unless otherwise
specified. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V IN
I FB
Operating Voltage Range
Feedback Pin Input Current
(Note 3)
2.5
5.5
± 0.1
V
μ A
V FB
? V LINE REG
? V LOAD REG
Feedback Voltage
Reference Voltage Line Regulation
Output Voltage Load Regulation
(Note 3)
V IN = 2.5V to 5V (Note 3)
Measured in Servo Loop, V ITH = 1.5V, (Note 3)
q
1.22
1.25
0.04
0.01
1.28
0.1
0.70
V
%/V
%
Measured in Servo Loop, V ITH = 1.9V, (Note 3)
– 0.80
–1.50
%
Input DC Supply Current (Note 4)
Active Mode
Sleep Mode
Shutdown
V FB = 0V
V FB = 1.4V (LTC1701 only)
V ITH/RUN = 0V
185
135
0.25
300
200
1
μ A
μ A
μ A
V ITH/RUN
Run Threshold High
Run Threshold Low
I TH/RUN Ramping Down
I TH/RUN Ramping Up
0.3
1.4
0.6
1.6
V
V
I ITH/RUN
I SW(PEAK)
R DS(ON)
Run Pullup Current
Peak Switch Current Threshold
Switch ON Resistance
V ITH/RUN = 1V
V FB = 0V
V IN = 5V, V FB = 0V
V IN = 3.3V, V FB = 0V
V IN = 2.5V, V FB = 0V
50
0.9
100
1.1
0.28
0.30
0.35
300
μ A
A
?
?
?
I SW(LKG)
t OFF
Switch Leakage Current
Switch Off-Time
V IN = 5V, V ITH/RUN = 0V, V FB = 0V
400
0.01
500
1
600
μ A
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1701E/LTC1701BE 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: The LTC1701/LTC1701B are tested in a feedback loop which
servos V FB to the midpoint for the error amplifier without R ITH/RUN = 1MHz
(V ITH = 1.7V unless otherwise specified).
Note 4: Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5: T J is calculated from the ambient T A and power dissipation P D
according to the following formula:
LTC1701ES5/LTC1701BES5: T J = T A + (P D ? 250 ° C/W)
2
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