參數(shù)資料
型號： LTC1701ES5
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Synchronous 8-Bit Up/Down Binary Counters 24-SOIC 0 to 70
中文描述： 1.1 A SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO5
封裝： PLASTIC, SOT-23, 5 PIN
文件頁數(shù)： 1/12頁
文件大小： 138K
代理商： LTC1701ES5
1
LTC 1701
1MHz Step-Down
DC /DC C onverter in SOT-23
December 1999
Final Electrical Specifications
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
I
PDAs/Palmtop PCs
I
Digital Cameras
I
Cellular Phones
I
Portable Media Players
I
PC Cards
I
Handheld Equipment
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode and OPTI-LOOP are trademarks of Linear Technology Corporation.
I
Tiny 5-Lead SOT-23 Package
I
Uses Tiny Capacitors and Inductor
I
High Frequency Operation: 1MHz
I
High Output Current: 500mA
I
Low R
DS(ON)
Internal Switch: 0.28
I
High Efficiency: Up to 94%
I
Current Mode Operation for Excellent Line
and Load Transient Response
I
Short-Circuit Protected
I
Low Quiescent Current: 135
μ
A
I
Low Dropout Operation: 100% Duty Cycle
I
Ultralow Shutdown Current: I
Q
< 1
μ
A
I
Peak Inductor Current Independent of Inductor Value
I
Output Voltages from 5V Down to 1.25V
APPLICATIOU
FEATURES
DESCRIPTIO
U
TYPICAL APPLICATIO
U
The LTC
1701 is the industry’s first 5-lead SOT-23 step
down, current mode, DC/DC converter. Intended for small
to medium power applications, it operates from 2.5V to
5.5V input voltage range and switches 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. With no load, the converter draws only 135
μ
A.
In shutdown, it draws less than 1
μ
A, making it ideal for
current sensitive applications.
In dropout, the internal P-channel MOSFET switch is
turned on continuously, thereby maximizing battery life.
Its small size and switching frequency enables the com-
plete DC/DC converter function to consume less than 0.3
square inches of PC board area.
V
IN
I
TH
/RUN
SW
V
FB
GND
LTC1701
D1
L1
4.7
μ
H
R4
1M
C1: TAIYO YUDEN JMK316BJ106ML
C2: SANYO POSCAP 6TPA47M
D1: MBRM120L
L1: SUMIDA CD43-4R7
R3
5.1k
C3
330pF
C1
10
μ
F
+
R2
121k
R1
121k
C2
47
μ
F
1701 F01
V
(2.5V/
500mA)
V
IN
2.5V TO
5.5V
+
Figure 1. Step-Down 2.5V/500mA Regulator
Efficiency Curve
LOAD CURRENT (mA)
1
10
100
1000
E
100
95
90
85
80
75
70
1701 F01a
V
IN
= 3.3V
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LTC1701ES5#TRM 功能描述:IC REG BUCK ADJ 0.5A TSOT23-5 RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LTC1701ES5#TRMPBF 功能描述:IC REG BUCK ADJ 0.5A TSOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
LTC1701ES5#TRPBF 功能描述:IC REG BUCK ADJ 0.5A TSOT23-5 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標準包裝:2,500 系列:- 類型:升壓（升壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:1.24 V ~ 30 V 輸入電壓:1.5 V ~ 12 V PWM 型:電流模式，混合 頻率 - 開關(guān):600kHz 電流 - 輸出:500mA 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-SOIC（0.154"，3.90mm 寬） 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:8-SOIC
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