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参数资料
| 型号： | LTC3548IMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ DL 10MSOP |
| 标准包装： | 50 |
| 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： | 管件 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
LTC3548
APPLICATIONS INFORMATION
V IN = 2.5V*
TO 5.5V
V IN
C1
10μF
RUN2 V IN
RUN1
R5
100k
C IN
RUN2
V IN
RUN1
MODE/SYNC
POR
POWER-ON
RESET
MODE/SYNC
POR
V OUT2 = 2.5V*
AT 400mA
L2
4.7μH
C5, 68pF
SW2
LTC3548
SW1
L1
2.2μH
C4, 33pF
V OUT1 = 1.8V
AT 800mA
V OUT2
C5
L2
SW2
LTC3548
SW1
L1
C4
V OUT1
C3
4.7μF
R4
887k
R3
280k
V FB2
GND
V FB1
R1
301k
R2
604k
C2
10μF
C OUT2
R4
R3
V FB2
GND
V FB1
R2
R1
C OUT1
C1, C2, C3: TAIYO YUDEN JMK212BJ106MG
C3: TAIYO YUDEN JMK212BJ475MG
L1: MURATA LQH32CN2R2M11
L2: MURATA LQH32CN4R7M23
3548 F03
3548 F04
*V OUT CONNECTED TO V IN FOR V IN ≤ 2.8V (DROPOUT)
Figure 3. LTC3548 Typical Application
BOLD LINES INDICATE HIGH CURRENT PATHS
Figure 4. LTC3548 Layout Diagram (See Board Layout Checklist)
TYPICAL APPLICATIONS
Low Ripple Buck Regulators Using Ceramic Capacitors
V IN = 2.5V
TO 5.5V
C1
R5
10μF
RUN2
V IN
RUN1
100k
POR
POWER-ON
RESET
L2
LTC3548
L1
V OUT2 = 1.8V
AT 400mA
10μH
C5, 68pF
SW2
SW1
4.7μH
C4, 33pF
V OUT1 = 1.2V
AT 800mA
C3
10μF
R4
887k
R3
442k
V FB2
MODE/SYNC
V FB1
GND
R1
604k
R2
604k
C2
10μF
C1, C2, C3: TDK C2012X5R0J106M
L1: SUMIDA CDRH2D18/HP-4R7NC
3548 TA03
L2: SUMIDA CDRH2D18/HP-100NC
Ef?ciency vs Load Current
100
95
90
85
80
75
70
65
60
55
1.8V
1.2V
V IN = 3.3V
PULSE SKIP MODE
NO LOAD ON OTHER CHANNEL
50
10
100
1000
LOAD CURRENT (mA)
3548 TA03b
3548fc
13
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相关代理商/技术参数 |
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| 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 |
| 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 |
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