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参数资料
| 型号： | LTC1877IMS8#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1.5 A SWITCHING REGULATOR, 605 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | LEAD FREE, PLASTIC, MSOP-8 |
| 文件页数： | 10/16页 |
| 文件大小： | 234K |
| 代理商： | LTC1877IMS8#TRPBF |
LTC1877
3
1877fa
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC1877E is guaranteed to meet specications from 0°C to
85°C. Specications over the –40°C to 85°C operating temperature range
are assured by design, characterization and correlation with statistical
process controls. The LTC1877I is guaranteed over the full –40°C to 85°C
operating temperature range.
The l denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 5V unless otherwise specied.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IPLL LPF
Phase Detector Output Current
Sinking Capability
Sourcing Capability
fPLLIN < fOSC
fPLLIN > fOSC
l
3
–3
10
–10
20
–20
μA
RPFET
RDS(ON) of P-Channel MOSFET
ISW = 100mA
0.65
0.85
Ω
RNFET
RDS(ON) of N-Channel MOSFET
ISW = –100mA
0.75
0.95
Ω
IPK
Peak Inductor Current
VFB = 0.7V, Duty Cycle < 35%
0.8
1.0
1.25
A
ILSW
SW Leakage
VRUN = 0V, VSW = 0V or 8.5V, VIN = 8.5V
±0.01
±1
μA
VSYNC/MODE
SYNC/MODE Threshold
l
0.3
1.0
1.5
V
ISYNC/MODE
SYNC/MODE Leakage Current
±0.01
±1
μA
VRUN
RUN Threshold
l
0.3
0.7
1.5
V
IRUN
RUN Input Current
±0.01
±1
μA
Note 3: TJ is calculated from the ambient temperature TA and power
dissipation PD according to the following formulas:
LTC1877EMS8: TJ = TA + (PD)(150°C/W)
Note 4: The LTC1877 is tested in a feedback loop which servos VFB to the
balance point for the error amplier (VITH = 1.2V).
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency.
TYPICAL PERFORMANCE CHARACTERISTICS
Efciency vs Input Voltage
Efciency vs Output Current
INPUT VOLTAGE (V)
0
EFFICIENCY
(%)
2
4
68
1877 G01
10
100
95
90
85
80
75
70
65
60
55
50
12
VOUT = 2.5V
L = 10μH
Burst Mode OPERATION
ILOAD = 0.1mA
ILOAD = 1mA
ILOAD = 300mA
ILOAD = 100mA I
LOAD = 10mA
OUTPUT CURRENT (mA)
0.1
EFFICIENCY
(%)
10
1000
1877 G02
1.0
100
VIN = 3.6V
VIN = 7.2V
VIN = 3.6V
VIN = 7.2V
100
90
80
70
60
50
40
30
20
10
0
VOUT = 2.5V
L = 10μH
PULSE-SKIPPING MODE
Burst Mode OPERATION
OUTPUT CURRENT (mA)
0.1
EFFICIENCY
(%)
10
1000
95
90
85
80
75
70
65
60
55
1877 G03
1.0
100
L = 15μH
L = 10μH
VIN = 10V
VOUT = 3.3V
Burst Mode OPERATION
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1878EMS8 | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 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:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1878EMS8#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 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:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON（1.45x1） 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2 |
| LTC1878EMS8#TR | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:2,500 系列:- 类型:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 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:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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| LTC1878EMS8PBF | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 2.65-6V MSOP8 |
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