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参数资料
| 型号： | LTC3562EUD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ QUAD 20QFN |
| 标准包装： | 121 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 4 |
| 输出电压： | 425 mV ~ 800 mV，0.6 V ~ 3.78 V |
| 输入电压： | 2.85 V ~ 5.5 V |
| PWM 型： | 多重 |
| 频率 - 开关： | 2.25MHz |
| 电流 - 输出： | 400mA，600mA |
| 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-WFQFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 20-QFN 裸露焊盘（3x3） |
LTC3562
I 2 C Quad Synchronous
Step-Down DC/DC Regulator
2 × 600mA, 2 × 400mA
FEATURES
DESCRIPTION
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Four Independent I 2 C Controllable Step-Down
Regulators (2 × 600mA, 2 × 400mA)
Two I 2 C Programmable Feedback Voltage
Regulators (R600A, R400A): V FB 425mV to 800mV
Two I 2 C Programmable Output Voltage Regulators
(R600B, R400B): V OUT 600mV to 3.775V
Programmable Modes: Pulse Skip, LDO, Burst Mode, ?
Forced Burst Mode Operation
Quiescent Current < 100μA (All Regulators Enabled
in LDO Mode)
Fixed 2.25MHz Switching Frequency (Pulse Skip
Mode)
Slew Limiting Reduces Switching Noise
Power-On Reset Output for Regulator R600A
Small, Thermally Enhanced, 20-Lead 3mm × 3mm
QFN Package
The LTC ? 3562 is a quad high ef?ciency monolithic syn-
chronous step-down regulator with an I 2 C interface. Two
regulators are externally adjustable and can have their
feedback voltages programmed between 425mV and
800mV in 25mV steps (Type A). The other two regulators
are ?xed output regulators whose output voltages can be
programmed between 600mV and 3.775V in 25mV steps
(Type B). All four regulators operate independently and
can be put into pulse skip, LDO, Burst Mode operation,
or forced Burst Mode operation through I 2 C control. The
Type-A regulators have separate RUN pins that can be
enabled if I 2 C control is unavailable.
The 2.85V to 5.5V input voltage range makes the LTC3562
ideally suited for single Li-Ion battery-powered applica-
tions. At low output load conditions, the regulators can
be switched into LDO, Burst Mode operation, or forced
APPLICATIONS
Burst Mode operation, extending battery life in portable
systems. The quiescent current drops to under 100μA
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Miscellaneous Handheld Applications with Multiple
Supply Rails
Personal Information Appliances
Wireless and DSL Modems
Digital Still Cameras
MP3 Players
Portable Instruments
with all regulators in LDO mode, and under 0.1μA when
all regulators are shut down.
Switching frequency is internally set to 2.25MHz, allowing
the use of small surface mount inductors and capacitors.
All regulators are internally compensated. The LTC3562 is
available in a low pro?le 3mm × 3mm QFN package.
L , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
High Ef?ciency Quad Step-Down Converter with I 2 C
R600x Burst Mode Ef?ciency
and Power Loss vs Load Current
Li-Ion/Polymer
3.4V TO 4.2V
V OUT
400A
1.5V
400mA 10 μ F
+
10pF
10 μ F
4.7 μ H
475k
V IN
RUN400A
SW400A
SCL SDA DV CC
POR600A
SW600A
LTC3562
FB600A
100k
3.3 μ H
MICROPROCESSOR
SDA
SCL
DV CC
POR
V OUT 600A
1.8V
600mA
634k 10pF 10 μ F
100
90
80
70
60
50
V OUT = 3.3V
V OUT =
2.5V
V OUT =
1.8V
V OUT = 1.2V
10000
1000
100
FB400A
RUN600A
40
10
536k
499k
30
20
V OUT = 1.2V,
1.8V, 2.5V
V OUT = 3.3V
1
V OUT 400B
1.2V
400mA
10 μ F
4.7 μ H
SW400B SW600B
OUT400B PGND AGND OUT600B
3.3 μ H
V OUT 600B
3.3V
10 μ F 600mA
10
0
0.01
0.1
1
10
V IN = 3.8V
100 1000
0.1
3562 TA01
LOAD CURRENT (mA)
3562 TA01b
3562fa
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3562EUD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:I2C Quad Synchronous Step-Down DC/DC Regulator 2 × 600mA, 2 × 400mA |
| LTC3563 | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage |
| LTC3563EDC | 制造商:LINER 制造商全称:Linear Technology 功能描述:500mA, Synchronous Step-Down DC/DC Converter with Selectable Output Voltage |
| LTC3563EDC#TRMPBF | 功能描述:IC REG BUCK SYNC 0.5A 6DFN 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:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 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:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
| LTC3563EDC#TRPBF | 功能描述:IC REG BUCK SYNC 0.5A 6DFN 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:500 系列:- 类型:切换式电容器（充电泵），反相 输出类型:固定 输出数:1 输出电压:-3V 输入电压:2.3 V ~ 5.5 V PWM 型:Burst Mode? 频率 - 开关:900kHz 电流 - 输出:100mA 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:SOT-23-6 细型，TSOT-23-6 包装:带卷 (TR) 供应商设备封装:TSOT-23-6 其它名称:LTC1983ES6-3#TRMTR |
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