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参数资料
| 型号： | LT1777C |
| 厂商： | Linear Technology Corporation |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 抗辐射高效，5安培开关稳压器 |
| 文件页数： | 17/24页 |
| 文件大小： | 270K |
| 代理商： | LT1777C |
17
LT1777
TYPICAL APPLICATIO
N
S
Basic 5V Output Application
Figure 8 shows a basic application that produces 5V at up
to 500mA I
OUT
. Efficiency and Internal Power Dissipation
graphs are shown in Figure 9 for input voltages of 12V,
24V and 36V, and for sense inductor values of 0
μ
H, 1
μ
H
and 2.2
μ
H. Be aware that continuous operation at the
combination of high input voltage, large sense inductor
and high output current may not be possible due to
thermal constraints. (Brief transients in input voltage or
output current should not present a problem, though.) As
shown, the SHDN and SYNC pins are unused, however
either (or both) can be optionally driven by external signals
as desired.
The data as shown were performed using an off-the-shelf
Coilcraft DO3316-224 as the main inductor. This is a
cost-effective inductor using an open style of construc-
tion. For a toroidal style inductor, the Coiltronics
CTX250-4 or similar may be substituted.
+
V
IN
V
CC
V
SW
V
D
FB
LT1777
SHDN
SYNC
V
C
4
10
7
6
5
D1
L1
0
μ
H TO 2.2
μ
H
(SEE BELOW)
L2
220
μ
H
C2
100
μ
F
10V
R1
36.5k
1%
1777 F08
V
OUT
5V
R2
12.1k
1%
3
V
IN
10V TO 40V
12
14
13
SGND
+
C1
39
μ
F
63V
R3
12k
C3
2200pF
C4
100pF
C1: PANASONIC HFQ ELECTROLYTIC
C2: AVX D CASE TPSD107M010R0080
C3, C4, C5: NPO OR X7R
C6, C7: Z5U
D1: MOTOROLA 100V, 1A SMD SCHOTTKY
MBRS1100
L1: SENSE INDUCTOR CAN VARY FROM 0
μ
H TO 2.2
μ
H
AS PER APPLICATION. GRAPHICAL DATA TAKEN WITH:
1
μ
H = D01608C-102, COILCRAFT OR SIMILAR
2.2
μ
H = D01608C-222, COILCRAFT OR SIMILAR (SEE TEXT)
L2: COILCRAFT D03316-224 OR SIMILAR (SEE TEXT)
C5
100pF
C6
0.1
μ
F
C7
0.1
μ
F
Figure 8. Basic 5V Output Application
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相关代理商/技术参数 |
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|---|---|
| LT1777CS | 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: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 |
| LT1777CS#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: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 |
| LT1777CS#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: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 |
| LT1777CS#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: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 |
| LT1777CSPBF | 制造商:Linear Technology 功能描述:Sw. Regulator Step-Down Low Noise SOIC16 |
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