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参数资料
| 型号： | LTC3545IUD-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.8A 16QFN |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 3 |
| 输出电压： | 0.6 V ~ 5.5 V |
| 输入电压： | 2.25 V ~ 5.5 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 800mA |
| 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： | 16-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QFN-EP（3x3） |
LTC3545/LTC3545-1
Triple 800mA Synchronous
Step-Down Regulator–2.25MHz
FEATURES
DESCRIPTION
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Three 800mA Outputs
High Ef?ciency: Up to 95%
2.25V to 5.5V Input Voltage Range
Low Ripple (<20mV P-P ) Burst Mode ? Operation
I Q : 58μA
2.25MHz Constant Frequency Operation or
Synchronizable to External 1MHz to 3MHz Clock
Power Good Indicators Ease Supply Sequencing
0.6V Reference Allows Low Output Voltages
Current Mode Operation/Excellent Transient Response
Low Pro?le 16-Lead 3mm × 3mm QFN Package
The LTC ? 3545/LTC3545-1 are triple, high efficiency,
monolithic synchronous buck regulators using a constant
frequency, current mode architecture. The regulators op-
erate independently with separate run pins. The 2.25V to
5.5V input voltage range makes the LTC3545/LTC3545-1
well suited for single Li-Ion battery-powered applications.
Low ripple pulse skip mode or high ef?ciency Burst Mode
operation is externally selectable. PWM pulse skip mode
operation provides very low output ripple voltage while
Burst Mode operation increases ef?ciency at low output
loads.
Smart Phones
Wireless and DSL Modems
Digital Still Cameras
Portable Instruments
Point of Load Regulation
APPLICATIONS
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L , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 6580258, 5481178, 6127815, 6498466, 6611131.
Switching frequency is internally set to 2.25MHz, or the
switching frequency can be synchronized to an external
1MHz to 3MHz clock. Power good indicators easily allow
power on sequencing between the three regulators.
The internal synchronous switches increase ef?ciency and
eliminate external Schottky diodes. Low output voltages are
supported with the 0.6V feedback reference voltage.
The LTC3545-1 replaces the SYNC/MODE function with a
third PGOOD pin and forces Burst Mode operation.
TYPICAL APPLICATION
High Ef?ciency Triple Step-Down Converter with Power Sequencing
V IN
2.25V TO 5.5V
Ef?ciency and Loss vs Load Current
C5
100
1
C4 10μF
10μF
90
R8
500k
R7
500k
GNDA
RUN1
V IN PV IN
PGND
SW2
L2
1.5μH
C7
V OUT2
1.2V
80
70
60
0.1
PGOOD1
20pF
50
0.01
V OUT1
1.8V
C6
L1
1.5μH
RUN2
PGOOD2
RUN3 LTC3545
SYNC/MODE
SW1
V FB2
SW3
R4
226k
L3
1.5μH
R3
226k
C8
C2
10μF
V OUT3
1.5V
40
30
20
10
0
0.0001
0.001
V IN = 2.5V
V IN = 3.6V
V IN = 4.2V
0.01 0.1
1
0.001
0.0001
20pF
20pF
LOAD CURRENT (A)
C1
10μF
R1
511k
R2
255k
V FB1
GNDA
PGND
V FB3
R6
200k
R5
301k
C3
10μF
T A = 25°C
V OUT = 2V
Burst Mode OPERATION
f OSC = 2.25MHz
3545 TA01b
3545 TA01
SINGLE CHANNEL
35451fb
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3545IUD-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple 800mA Synchronous Step-Down Regulator-2.25MHz |
| LTC3545IUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Triple 800mA Synchronous Step-Down Regulator-2.25MHz |
| LTC3546 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Synchronous, 3A/1A or 2A/2A Confi gurable Step-Down DC/DC Regulator |
| LTC3546EFE#PBF | 功能描述:IC REG BUCK SYNC ADJ DL 28TSSOP 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 |
| LTC3546EFE#PBF | 制造商:Linear Technology 功能描述:IC DUAL SYNC STEP-DOWN DC/DC REG 28-TSSO |
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