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参数资料
| 型号： | LTC1701BES5#TRM |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.5A TSOT23-5 |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 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： | 1MHz |
| 电流 - 输出： | 500mA |
| 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-23-5 细型，TSOT-23-5 |
| 包装： | 剪切带 (CT) |
| 供应商设备封装： | TSOT-23-5 |
| 其它名称： | LTC1701BES5 LTC1701BES5#TRMCT LTC1701BES5-ND |
LTC1701/LTC1701B
1MHz Step-Down
DC/DC Converters in SOT-23
FEATURES
DESCRIPTIO
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Tiny 5-Lead SOT-23 Package
Uses Tiny Capacitors and Inductor
High Frequency Operation: 1MHz
High Output Current: 500mA
Low R DS(ON) Internal Switch: 0.28 ?
High Efficiency: Up to 94%
Current Mode Operation for Excellent Line
and Load Transient Response
Short-Circuit Protected
Low Quiescent Current: 135 μ A (LTC1701)
Low Dropout Operation: 100% Duty Cycle
Ultralow Shutdown Current: I Q < 1 μ A
Peak Inductor Current Independent of Inductor Value
Output Voltages from 5V Down to 1.25V
The LTC ? 1701/LTC1701B are the industry’s first SOT-23
step-down, current mode, DC/DC converters. Intended for
low to medium power applications, they operate from 2.5V
to 5.5V input voltage range and switch at 1MHz, allowing
the use of tiny, low cost capacitors and inductors 2mm or
less in height. The output voltage is adjustable from 1.25V
to 5V. A built-in 0.28 ? switch allows up to 0.5A of output
current at high efficiency. OPTI-LOOP TM compensation
allows the transient response to be optimized over a wide
range of loads and output capacitors.
The LTC1701 incorporates automatic power saving Burst
Mode TM operation to reduce gate charge losses when the
load current drops below the level required for continuous
operation. The LTC1701B operates continuously to very
low load currents to provide low ripple at the expense of
PDAs/Palmtop PCs
Digital Cameras
Cellular Phones
Portable Media Players
PC Cards
APPLICATIO S
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light load efficiency. With no load, the LTC1701 draws only
135 μ A. In shutdown, both devices draw less than 1 μ A,
making them ideal for current sensitive applications.
Their small size and switching frequency enables a
complete DC/DC converter function to consume less than
0.3 square inches of PC board area.
s
Handheld Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode and OPTI-LOOP are trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO N
V IN
L1
4.7 μ H
V OUT
100
Efficiency Curve
2.5V TO
5.5V
R4
V IN
SW
D1
R2
(2.5V/
500mA)
95
90
V IN = 3.3V
V OUT = 2.5V
C1
10 μ F
+
1M
R3
5.1k
LTC1701
I TH /RUN
GND
V FB
121k
+
R1
121k
C2
47 μ F
85
80
75
70
LTC1701
LTC1701B
C3
330pF
65
60
C1: TAIYO YUDEN JMK316BJ106ML
C2: SANYO POSCAP 6TPA47M
1701 F01a
55
D1: MBRM120L
L1: SUMIDA CD43-4R7
Figure 1. 2.5V/500mA Step-Down Regulator
50
1
10 100
LOAD CURRENT (mA)
1000
1701 F01b
1
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相关代理商/技术参数 |
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| LTC1701ES5 | 制造商:Linear Technology 功能描述:Swithed-Mode Power Supply Controller, Current Mode Type, 6 Pin, Plastic, TSOP |
| LTC1701ES5#PBF | 制造商:Linear Technology 功能描述:DP-SWREG/Monolithic, CUT TAPE 1MHz Step-dn DC/DC Convtr in SOT-23 |
| LTC1701ES5#TR | 功能描述:IC REG BUCK ADJ 0.5A TSOT23-5 RoHS:否 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1701ES5#TRM | 功能描述:IC REG BUCK ADJ 0.5A TSOT23-5 RoHS:否 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
| LTC1701ES5#TRMPBF | 功能描述:IC REG BUCK ADJ 0.5A TSOT23-5 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:升压（升压） 输出类型:可调式 输出数:1 输出电压:1.24 V ~ 30 V 输入电压:1.5 V ~ 12 V PWM 型:电流模式，混合 频率 - 开关:600kHz 电流 - 输出:500mA 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:8-SOIC（0.154"，3.90mm 宽） 包装:带卷 (TR) 供应商设备封装:8-SOIC |
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