参数资料
| 型号： | SPX2954S-L-3-3 |
| 厂商： | Exar Corporation |
| 文件页数： | 3/17页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 3.3V .25A 8SOIC |
| 标准包装： | 98 |
| 稳压器拓扑结构： | 正，固定式 |
| 输出电压： | 3.3V |
| 输入电压： | 最高 30V |
| 电压 - 压降（标准）： | 0.31V @ 250mA |
| 稳压器数量： | 1 |
| 电流 - 输出： | 250mA |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
ELECTRICAL CHARACTERISTICS (Cont.)
V IN =V O +1V, I L =100 μ A, C L =1 μ F ( NOTE 2), T A = 25 ° C, unless otherwise specified.
SPX2954A
SPX2954
PARAMETER
CONDITIONS
MIN. TYP.
MAX
MIN. TYP. MAX.
UNIT
Error Comparator
Output Leakage Current
V OH = 30V
0.01
1
0.01
1
μ A
Output Low Voltage
V IN = V O -0.5V,
I OL = 400 μ A
150
250
150
250
mV
Upper Threshold Voltage
(N OTE 7)
40
60
40
60
mV
Lower Threshold Voltage
Hysteresis
(N OTE 7)
(N OTE 7)
75
15
95
75
15
95
mV
mV
Shutdown
Input logic Voltage
Low (Regulator ON)
1.3
0.7
1.3
0.7
V
High (Regulator OFF)
2.0
2.0
Shutdown Input Current
VS = 2.4V
VS= 30V
30
400
50
800
30
400
50
800
μ A
Regulator Output Current (N OTE 8)
3
10
3
10
μ A
in Shutdown
Thermal Resistance Θ JA
TO-263-3
SOIC-8
TO-92-3
SOT-223
TO-220-3
31.4
128.4
131.9
62.3
29.4
° C/W
° C/W
° C/W
° C/W
° C/W
N OTE 1: Output or reference voltage temperature coefficients defined as the worst case voltage change divided
by the total temperature range.
N OTE 2: Unless otherwise specified all limits guaranteed for T J = 25 ° C, V IN = 6V, I L = 100 μ A and C L = 1 μ F.
Additional conditions for the 8-pin versions are feedback tied to 5V tap and output tied to output sense
(V OUT = 5V) and V SHUTDOWN ≤ 0.8V.
N OTE 3: Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle.
Changes in output voltage due to heating effects are covered under the specification for thermal
regulation.
N OTE 4: Line regulation for the SPX2954 is tested at I L = 1mA.
N OTE 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV
below its nominal value measured at 1V differential. At very low values of programmed output voltage,
the minimum input supply voltage of 2V (2.3V over temperature) must be taken into account.
N OTE 6: V REF ≤ V OUT ≤ (V IN - 1V), 2.3 ≤ V IN ≤ 30V, 100 μ A ≤ I L ≤ 250mA, T J ≤ T JMAX .
N OTE 7: Comparator thresholds are expressed in terms of a voltage differential at the feedback terminal below
the nominal reference voltage measured at 6V input. To express these thresholds in terms of output
voltage change, multiply by the error amplifier gain = V OUT /V REF = (R 1 + R 2 )/R 2 . For example, at a
programmed output voltage of 5V, the error output is guaranteed to go low when the output drops by 95
mV x 5V/1.235 = 384 mV. Thresholds remain constant as a percent of V OUT as V OUT is varied, with the
dropout warning occurring at typically 5% below nominal, 7.5% guaranteed.
N OTE 8: V SHUTDOWN ≥ 2V, V IN ≤ 30V, V OUT =0, Feedback pin tied to 5V/3.3V Tap.
Date: 12/9/05
SPX2954, 250mA Low Dropout Voltage Regulator
3
? Copyright 2005 Sipex Corporation
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SPX2954S-L-3-3/TR | 功能描述:低压差稳压器 - LDO 250mA LOW DROPOUT RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| SPX2954S-L-5-0 | 功能描述:低压差稳压器 - LDO 250mA LOW DROPOUT RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| SPX2954S-L-5-0/TR | 功能描述:低压差稳压器 - LDO 250mA LOW DROPOUT RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| SPX2954T-3.3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:250mA Low Dropout Voltage Regulator |
| SPX2954T-3-3 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:250mA Low Dropout Voltage Regulator |
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