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参数资料
| 型号： | LTC1148HVCS-3.3#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO14 |
| 封装： | 0.150 INCH, PLASTIC, SOP-14 |
| 文件页数： | 15/20页 |
| 文件大小： | 237K |
| 代理商： | LTC1148HVCS-3.3#TR |
4
LTC1148
LTC1148-3.3/LTC1148-5
114835fd
ELECTRICAL C
C
HARA TERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC1148CN, LTC1148CN-3.3, LTC1148CN-5: TJ = TA + (PD × 70°C/W)
LTC1148CS, LTC1148CS-3.3, LTC1148CS-5: TJ = TA + (PD × 110°C/W)
Note 3: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 4: The LTC1148 and LTC1148HV versions are tested with external
feedback resistors resulting in a nominal output voltage of 5V. The
LTC1148L version is tested with external feedback resistors resulting in a
nominal output voltage of 2.5V.
Note 5: In applications where RSENSE is placed at ground potential, the off
time increases approximately 40%.
Note 6: The LTC1148, LTC1148HV and LTC1148L series are not tested
and not quality assurance sampled at –40°C and 85°C. These
specifications are guaranteed by design and/or correlation. The
LTC1148HVI-5 is guaranteed over the full –40°C to 85°C operating
temperature range.
Note 7: The LTC1148L and LTC1148L-3.3 allow operation to VIN = 3.5V.
CC
HARA TERISTICS
UW
A
TYPICALPERFOR
CE
Line Regulation
Efficiency vs Input Voltage
LOAD CURRENT (A)
0
–100
V
OUT
(mV)
–80
–60
–40
–20
0
20
0.5
1
1.5
2
LTC1148 TPC03
2.5
FIGURE 1 CIRCUIT
RSENSE = 0.05
VIN = 6V
VIN = 12V
INPUT VOLTAGE (V)
0
80
EFFICIENCY
(%)
82
86
88
90
100
94
4
8
LTC1148 TPC01
84
96
98
92
12
16
20
ILOAD = 100mA
FIGURE 1 CIRCUIT
ILOAD = 1A
DC Supply Current
Supply Current in Shutdown
Load Regulation
Operating Frequency
vs (VIN – VOUT)
(VIN – VOUT) VOLTAGE (V)
0
NORMALIZED
FREQUENCY
0.6
1.0
8
LTC1148 TPC06
0.4
0
2
4
6
0.2
1.2
0.8
10
12
1.4
1.6
VOUT = 5V
0°C
70°C
25°C
INPUT VOLTAGE
0
SUPPLY
CURRENT
(mA)
0.3
0.9
1.2
1.5
4
LTC1148 TPC04
0.6
26
1.8
2.1
8
10 12 14 16 18
SLEEP MODE
ACTIVE MODE
NOT INCLUDING
GATE CHARGE CURRENT
20
INPUT VOLTAGE (V)
0
SUPPLY
CURRENT
(
A)
2
6
8
10
20
14
4
8
10
18
LTC1148 TPC05
4
16
18
12
26
12
14 16
VSHUTDOWN = 2V
20
INPUT VOLTAGE (V)
0
V
OUT
(mV)
0
10
20
16
LTC1148 TPC02
–10
–20
–40
4
812
–30
40
30
FIGURE 1 CIRCUIT
ILOAD = 1A
20
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| LTC1266CS#TR-3.3 | SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO16 |
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相关代理商/技术参数 |
参数描述 |
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| LTC1148HVCS5 | 制造商:LT 功能描述:REREALED |
| LTC1148HVCS-5 | 功能描述:IC REG CTRLR BUCK PWM CM 14-SOIC 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 |
| LTC1148HVCS-5#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 14-SOIC 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:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 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:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| LTC1148HVCS-5#TR | 功能描述:IC REG CTRLR BUCK PWM CM 14-SOIC 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 |
| LTC1148HVCS-5#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 14-SOIC 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:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 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:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
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