- 您现在的位置：买卖IC网 > PDF目录1828 > LTC1877IMS8#TRPBF (Linear Technology)IC REG BUCK SYNC ADJ 0.6A 8MSOP PDF资料下载
参数资料
| 型号： | LTC1877IMS8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/18页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 0.6A 8MSOP |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.8 V ~ 10 V |
| 输入电压： | 2.65 V ~ 10 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 550kHz |
| 电流 - 输出： | 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-MSOP |
LTC1877
High Ef?ciency
Monolithic Synchronous
Step-Down Regulator
FEATURES
DESCRIPTION
n
n
n
n
n
n
n
n
n
n
n
n
n
n
n
High Ef?ciency: Up to 95%
Very Low Quiescent Current: Only 10μA
During Operation
600mA Output Current at V IN = 5V
2.65V to 10V Input Voltage Range
550kHz Constant-Frequency Operation
No Schottky Diode Required
Low Dropout Operation: 100% Duty Cycle
Synchronizable from 400kHz to 700kHz
Selectable Burst Mode ? Operation or
Pulse-Skipping Mode
0.8V Reference Allows Low Output Voltages
Shutdown Mode Draws < 1μA Supply Current
±2% Output Voltage Accuracy
Current Mode Control for Excellent Line and Load
Transient Response
Overcurrent and Overtemperature Protected
Available in 8-Lead MSOP Package
The LTC ? 1877 s a high ef?ciency monolithic synchronous
buck regulator using a constant-frequency, current mode
architecture. Supply current during operation is only 10μA
and drops to < 1μA in shutdown. The 2.65V to 10V input
voltage range makes the LTC1877 ideally suited for both
single and dual Li-Ion battery-powered applications. 100%
duty cycle provides low dropout operation, extending bat-
tery life in portable systems.
Switching frequency is internally set at 550kHz, allowing
the use of small surface mount inductors and capacitors.
For noise sensitive applications the LTC1877 can be exter-
nally synchronized from 400kHz to 700kHz. Burst Mode
operation is inhibited during synchronization or when the
SYNC/MODE pin is pulled low, preventing low frequency
ripple from interfering with audio circuitry.
The internal synchronous switch increases ef?ciency
and eliminates the need for an external Schottky diode.
APPLICATIONS
Low output voltages are easily supported with the 0.8V
feedback reference voltage. The LTC1877 is available in a
n
n
n
n
n
n
Cellular Telephones
Wireless Modems
Personal Information Appliances
Portable Instruments
Distributed Power Systems
Battery-Powered Equipment
space saving 8-lead MSOP package. Lower input voltage
applications (less than 7V abs max) should refer to the
LTC1878 data sheet.
L , LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
TYPICAL APPLICATION
Ef?ciency vs Output Current
High Ef?ciency Step-Down Converter
100
95
V IN = 3.6V
V IN
I TH
VOUT
V IN
2.65V
TO 10V
10 μ F**
CER
7
6
1
2
SYNC
LTC1877
RUN
GND
SW
V FB
5
3
10 μ H*
20pF
887k
+
?
3.3V
47 μ F***
90
85
80
75
70
V IN = 7.2V
V IN = 5V
V IN = 10V
220pF
280k
65
4
60
V OUT = 3.3V
V OUT CONNECTED TO V IN FOR 2.65V < V IN < 3.3V
*TOKO D62CB A920CY-100M
** TAIYO-YUDEN CERAMIC LMK325BJ106MN
*** SANYO POSCAP 6TPA47M
?
1877 TA01
55
50
0.1
L = 10μH
Burst Mode OPERATION
1.0 10 100 1000
OUTPUT CURRENT (mA)
1877 TA02
1877fb
1
相关PDF资料 |
PDF描述 |
|---|---|
| LTC1878EMS8#TRPBF | IC REG BUCK SYNC ADJ 0.6A 8MSOP |
| LTC1879EGN#TRPBF | IC REG BUCK SYNC ADJ 1.2A 16SSOP |
| LTC1909-8EG#TR | IC REG CTRLR BUCK PWM CM 28-SSOP |
| LTC1911EMS8-1.5#TR | IC REG BUCK 1.5V 0.25A 8MSOP |
| LTC1922EG-1#PBF | IC REG CTRLR ISO PWM 20-SSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC1878EMS8 | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP 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 |
| LTC1878EMS8#PBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP 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 |
| LTC1878EMS8#TR | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP 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 |
| LTC1878EMS8#TRPBF | 功能描述:IC REG BUCK SYNC ADJ 0.6A 8MSOP 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 |
| LTC1878EMS8PBF | 制造商:Linear Technology 功能描述: 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 2.65-6V MSOP8 |
发布紧急采购，3分钟左右您将得到回复。