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参数资料
| 型号： | LTC3548IMSE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 10MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 2 |
| 输出电压： | 0.6 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： | 2.25MHz |
| 电流 - 输出： | 400mA，800mA |
| 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： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
LTC3548
ELECTRICAL CHARACTERISTICS The ● denotes the speci?cations which apply over the full operating
temperature range, otherwise speci?cations are at T A = 25°C. V IN = 3.6V, unless otherwise speci?ed. (Note 2)
SYMBOL
ΔV LOADREG
I S
PARAMETER
Output Voltage Load Regulation
Input DC Supply Current
Active Mode
Sleep Mode
Shutdown
CONDITIONS
(Note 3)
(Note 4)
V FB1 = V FB2 = 0.5V
V FB1 = V FB2 = 0.63V, MODE/SYNC = 3.6V
RUN = 0V, V IN = 5.5V, MODE/SYNC = 0V
MIN
TYP
0.5
700
40
0.1
MAX
950
60
1
UNITS
%
μA
μA
μA
f OSC
Oscillator Frequency
V FB = 0.6V
l
1.8
2.25
2.7
MHz
f SYNC
Synchronization Frequency
2.25
MHz
I LIM
R DS(ON)
I SW(LKG)
POR
Peak Switch Current Limit Channel 1
Peak Switch Current Limit Channel 2
Top Switch On-Resistance
Bottom Switch On-Resistance
Switch Leakage Current
Power-On Reset Threshold
V IN = 3V, V FB = 0.5V, Duty Cycle <35%
V IN = 3V, V FB = 0.5V, Duty Cycle <35%
(Note 6)
(Note 6)
V IN = 5V, V RUN = 0V, V FB = 0V
V FB Ramping Down, MODE/SYNC = 0V
0.95
0.6
1.2
0.7
0.35
0.30
0.01
–8.5
1.6
0.9
0.45
0.45
1
A
A
Ω
Ω
μA
%
Power-On Reset On-Resistance
Power-On Reset Delay
100
262,144
200
Ω
Cycles
V RUN
I RUN
MODE
RUN Threshold
RUN Leakage Current
Mode Threshold Low
l
l
0.3
0
1
0.01
1.5
1
0.5
V
μA
V
Mode Threshold High
V IN – 0.5
V IN
V
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 LTC3548 is guaranteed to meet speci?ed performance from
0°C to 85°C. Speci?cations over the – 40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls. The LTC3548I is guaranteed to meet speci?ed
performance over the full –40°C to 85°C temperature range.
Note 3: The LTC3548 is tested in a proprietary test mode that connects V FB
to the output of the error ampli?er.
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: T J = T A + (P D ? θ JA ).
Note 6: The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C unless otherwise speci?ed.
SW
5V/DIV
V OUT
20mV/DIV
I L
200mA/DIV
Burst Mode Operation
SW
5V/DIV
V OUT
10mV/DIV
I L
200mA/DIV
Pulse-Skipping Mode
V OUT
200mV/DIV
I L
500mA/DIV
I LOAD
500mA/DIV
Load Step
V IN = 3.6V
2μs/DIV
3548 G01
V IN = 3.6V
1μs/DIV
3548 G02
V IN = 3.6V
20μs/DIV
3548 G03
V OUT = 1.8V
I LOAD = 180mA
CHANNEL 1; CIRCUIT OF FIGURE 3
V OUT = 1.8V
I LOAD = 30mA
CHANNEL 1; CIRCUIT OF FIGURE 3
V OUT = 1.8V
I LOAD = 80mA TO 800mA
CHANNEL 1; CIRCUIT OF FIGURE 3
3548fc
3
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相关代理商/技术参数 |
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| LTC3549 | 制造商:LINER 制造商全称:Linear Technology 功能描述:250mA Low VIN Buck Regulator in 2mm × 3mm DFN |
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| LTC3549EDCB#PBF | 制造商:Linear Technology 功能描述:VOLTAGE REGULATOR BUCK 2.25M 制造商:Linear Technology 功能描述:VOLTAGE REGULATOR, BUCK, 2.25MHZ, 250mA, DFN-6; Primary Input Voltage:5.5V; No. of Outputs:1; Output Current:250mA; No. of Pins:6; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:6-DFN ;RoHS Compliant: Yes |
| LTC3549EDCB#TRM | 制造商:Linear Technology 功能描述:250MA, LOW VIN BUCK REGULATOR |
| LTC3549EDCB#TRMPBF | 功能描述:IC REG BUCK SYNC ADJ 0.25A 6DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 产品培训模块:High Efficiency Current Mode Switching Regulators CMOS LDO Regulators 特色产品:BD91x Series Step-Down Regulators 标准包装:2,500 系列:- 类型:降压（降压） 输出类型:两者兼有 输出数:2 输出电压:3.3V，0.8 V ~ 2.5 V 输入电压:4.5 V ~ 5.5 V PWM 型:电流模式 频率 - 开关:1MHz 电流 - 输出:1.5A 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:20-VFQFN 裸露焊盘 包装:带卷 (TR) 供应商设备封装:VQFN020V4040 产品目录页面:1373 (CN2011-ZH PDF) 其它名称:BD9152MUV-E2TR |
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