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参数资料
| 型号： | LT1777IS |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 1 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | 0.150 INCH, PLASTIC, SO-16 |
| 文件页数： | 3/24页 |
| 文件大小： | 270K |
| 代理商： | LT1777IS |
3
LT1777
ELECTRICAL CHARACTERISTICS
The
G
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
J
= 25
°
C.
V
IN
= 24V, V
SW
Open, V
CC
= 5V, V
C
= 1.4V unless otherwise noted.
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
Control circuitry powered from V
CC
.
Note 3:
Switch current limit is DC trimmed and tested in production.
Inductor dI/dt rate will cause a somewhat higher current limit in actual
application.
Note 4:
During normal operation the V
SW
pin may fly as much as 3V
below ground. However, the LT1777 may not be used in an inverting
DC/DC configuration.
SYMBOL
Output Switch
R
ON
I
LIM
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Output Switch On Voltage
Switch Current Limit
Output dl/dt Sense Voltage
I
SW
= 0.5A
(Note 3)
1.0
0.70
1.3
1.5
1.0
V
A
V
V
G
0.55
G
0.6
2.0
Current Amplifier
Control Pin Threshold
Control Voltage to Switch Transconductance
Duty Cycle = 0%
0.9
1.1
2
1.25
V
A/V
Timing
f
Switching Frequency
90
85
85
100
110
115
kHz
kHz
%
G
Maximum Switch Duty Cycle
Sync Function
Minimum Sync Amplitude
Synchronization Range
SYNC Pin Input R
SHDN Pin Function
V
SHDN
Shutdown Mode Threshold
G
90
G
1.5
2.2
250
V
G
130
kHz
k
40
0.5
V
V
V
V
G
0.2
0.8
Upper Lockout Threshold
Lower Lockout Threshold
Shutdown Pin Current
Switching Action On
Switching Action Off
V
SHDN
= 0V
V
SHDN
= 1.25V
1.260
1.245
12
2.5
I
SHDN
20
10
μ
A
μ
A
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相关代理商/技术参数 |
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|---|---|
| LT1777IS#PBF | 功能描述:IC REG BUCK ADJ 0.7A 16SOIC 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 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:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1777IS#PBF | 制造商:Linear Technology 功能描述:DC/DC Converter IC |
| LT1777IS#TR | 功能描述:IC REG BUCK ADJ 0.7A 16SOIC 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 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:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1777IS#TRPBF | 功能描述:IC REG BUCK ADJ 0.7A 16SOIC 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:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 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:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT1777ISPBF | 制造商:Linear Technology 功能描述:Sw. Regulator Step-Down Low Noise SOIC16 |
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