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参数资料
| 型号： | LTC3548IDD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 5/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 10DFN |
| 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-WFDFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 10-DFN（3x3） |
LTC3548
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C unless otherwise speci?ed.
Ef?ciency vs Load Current
Ef?ciency vs Load Current
Ef?ciency vs Load Current
100
2.7V
3.6V
100
100
90
80
4.2V
95
90
85
2.7V
3.6V
95
90
85
2.7V
3.6V
4.2V
70
60
80
75
80
75
4.2V
V OUT = 2.5V, CHANNEL 1
50 Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
CIRCUIT OF FIGURE 3
40
70
65
60
V OUT = 1.5V, CHANNEL 1
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
CIRCUIT OF FIGURE 3
70
65
60
V OUT = 1.2V, CHANNEL 1
Burst Mode OPERATION
NO LOAD ON OTHER CHANNEL
CIRCUIT OF FIGURE 3
1
10 100
1000
1
10 100
1000
1
10 100
1000
LOAD CURRENT (mA)
PIN FUNCTIONS
3548 G10
LOAD CURRENT (mA)
3548 G14
LOAD CURRENT (mA)
3548 G13
V FB1 (Pin 1): Output Feedback. Receives the feedback
voltage from the external resistive divider across the
output. Nominal voltage for this pin is 0.6V.
RUN1 (Pin 2): Regulator 1 Enable. Forcing this pin to V IN
enables regulator 1, while forcing it to GND causes regulator
1 to shut down. This pin must be driven; do not ?oat.
V IN (Pin 3): Main Power Supply. Must be closely decoupled
to GND.
SW1 (Pin 4): Regulator 1 Switch Node Connection to the
Inductor. This pin swings from V IN to GND.
GND (Pin 5): Ground. This pin is not connected internally.
Connect to PCB ground for optimum shielding.
MODE/SYNC (Pin 6): Combination Mode Selection and
Oscillator Synchronization. This pin controls the operation
of the device. When tied to V IN or GND, Burst Mode
operation or pulse-skipping mode is selected, respectively.
Do not ?oat this pin. The oscillation frequency can be
synchronized to an external oscillator applied to this pin
and pulse-skipping mode is automatically selected.
SW2 (Pin 7): Regulator 2 Switch Node Connection to the
Inductor. This pin swings from V IN to GND.
POR (Pin 8): Power-On Reset . This common-drain logic
output is pulled to GND when the output voltage falls
below –8.5% of regulation and goes high after 117ms
when both channels are within regulation.
RUN2 (Pin 9): Regulator 2 Enable. Forcing this pin to V IN
enables regulator 2, while forcing it to GND causes regulator
2 to shut down. This pin must be driven; do not ?oat.
V FB2 (Pin 10): Output Feedback. Receives the feedback
voltage from the external resistive divider across the output.
Nominal voltage for this pin is 0.6V.
Exposed Pad (GND) (Pin 11): Power Ground. Connect to
the (–) terminal of C OUT , and (–) terminal of C IN . Must be
connected to electrical ground on PCB.
3548fc
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3548IMSE | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, 400mA/800mA, 2.25MHz |
| LTC3548IMSE#PBF | 功能描述:IC REG BUCK SYNC ADJ DL 10MSOP 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:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°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 |
| LTC3548IMSE#TRPBF | 功能描述:IC REG BUCK SYNC ADJ DL 10MSOP 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:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°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 |
| LTC3548IMSE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator |
| LTC3548IMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, 400mA/800mA, 2.25MHz Step-Down DC/DC Regulator |
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