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参数资料
| 型号： | LTC3250ES6-1.2#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 1.2V 0.25A SOT23-6 |
| 标准包装： | 500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.2V |
| 输入电压： | 2.7 V ~ 5.5 V |
| PWM 型： | Burst Mode? |
| 频率 - 开关： | 1.5MHz |
| 电流 - 输出： | 250mA |
| 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-23-6 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SOT-23-6 |
| 其它名称： | LTC3250ES6-1.2 LTC3250ES6-1.2-ND |
LTC3250-1.5/LTC3250-1.2
ABSOLUTE
(Note 1)
AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
V IN to GND ................................................... –0.3V to 6V
SHDN to GND ............................... –0.3V to (V IN + 0.3V)
I OUT (Note 2)....................................................... 350mA
Operating Ambient Temperature Range (Note 3)
........................................................... – 40 ° C to 85 ° C
Storage Temperature Range ................ – 65 ° C to 150 ° C
Lead Temperature (Soldering, 10 sec).................. 300 ° C
TOP VIEW
V IN 1 6 C +
GND 2 5 V OUT
SHDN 3 4 C –
S6 PACKAGE
6-LEAD PLASTIC SOT-23
T JMAX = 150 ° C, θ JA = 230 ° C/W,
θ JC = 102 ° C/W
ORDER PART
NUMBER
LTC3250ES6-1.5
LTC3250ES6-1.2
S6 PART MARKING
LTZE
LTAGJ
Consult LTC Marketing 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 = 3.6V, C FLY = 1 μ F, C IN = 1 μ F, C OUT = 4.7 μ F unless otherwise noted.
SYMBOL
V IN
PARAMETER
LTC3250-1.5 Operating Voltage Range
LTC3250-1.2 Operating Voltage Range
CONDITIONS
q
q
MIN
3.1
2.7
TYP
MAX
5.5
5.5
UNITS
V
V
V OUT
I IN
LTC3250-1.5 Output Voltage Range
LTC3250-1.2 Output Voltage Range
Operating Current
Shutdown Current
I OUT ≤ 50mA 3.1V ≤ V IN ≤ 5.5V
I OUT ≤ 100mA 3.2V ≤ V IN ≤ 5.5V
I OUT ≤ 250mA 3.5V ≤ V IN ≤ 5V
I OUT ≤ 150mA 2.7V < V IN < 5.5V
I OUT ≤ 250mA 2.9V ≤ V IN ≤ 5V
I OUT = 0mA
SHDN = 0V
q
q
q
q
q
1.44
1.44
1.44
1.15
1.15
1.5
1.5
1.5
1.2
1.2
35
0.01
1.56
1.56
1.56
1.25
1.25
60
1
V
V
V
V
V
μ A
μ A
V RB
V RC
Burst Mode Operation Output Ripple
Continuous Mode Output Ripple
12
4
mV P-P
mV P-P
f OSC
V IH
V IL
Switching Frequency
SHDN Input Hi Voltage
SHDN Input Low Voltage
q
q
q
1.2
1.2
1.5
0.8
0.8
1.8
0.4
MHz
V
V
I IH
I IL
t ON
SHDN Input Current
SHDN Input Current
Turn On Time
SHDN = V IN
SHDN = 0V
R LOAD = 6 ?
q
q
–1
–1
0.8
1
1
μ A
μ A
ms
LTC3250-1.5 Load Regulation
LTC3250-1.2 Load Regulation
Line Regulation
0 ≤ I OUT ≤ 250mA
0 ≤ I OUT ≤ 250mA
I OUT = 250mA
0.15
0.12
0.2
mV/mA
mV/mA
%/V
R OL
Open-Loop Output Impedance
I OUT = 250mA (Note 4)
1.0
?
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Based on long term current density limitations.
Note 3: The LTC3250-1.5E/LTC3250-1.2E are guaranteed to meet
specified performance from 0 ° C to 70 ° C. Specifications over the –40 ° C
and 85 ° C operating temperature range are assured by design
Note 4: Output not in regulation; R OL = (V IN /2 - V OUT )/I OUT .
Note 5: This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125 ° C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
characterization and correlation with statistical process controls.
3250fa
2
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