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参数资料
| 型号： | LT1766IGN#TR |
| 厂商： | Linear Technology |
| 文件页数： | 9/30页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 1.5A 16SSOP |
| 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： | 1.2 V ~ 54 V |
| 输入电压： | 5.5 V ~ 60 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-SSOP |
| 其它名称： | LT1766IGNTR |
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LT1766/LT1766-5
BLOCK DIAGRAM
will have 90° phase shift at a much lower frequency, but
will not have the additional 90° shift until well beyond
the LC resonant frequency. This makes it much easier to
frequency compensate the feedback loop and also gives
much quicker transient response.
Most of the circuitry of the LT1766 operates from an internal
2.9V bias line. The bias regulator normally draws power
from the regulator input pin, but if the BIAS pin is connected
to an external voltage higher than 3V, bias power will be
drawn from the external source (typically the regulated
output voltage). This will improve ef?ciency if the BIAS
pin voltage is lower than regulator input voltage.
High switch ef?ciency is attained by using the BOOST
pin to provide a voltage to the switch driver which is
higher than the input voltage, allowing switch to be satu-
rated. This boosted voltage is generated with an external
capacitor and diode. Two comparators are connected to the
shutdown pin. One has a 2.38V threshold for undervoltage
lockout and the second has a 0.4V threshold for complete
shutdown.
V IN
4
R LIMIT
R SENSE
BIAS 10
2.9V BIAS
REGULATOR
INTERNAL
V CC
CURRENT
SLOPE COMP
∑
COMPARATOR
SYNC 14
ANTISLOPE COMP
BOOST
6
SHUTDOWN
COMPARATOR
0.4V
200kHz
OSCILLATOR
S
R
R S
FLIP-FLOP
DRIVER
CIRCUITRY
Q1
POWER
SWITCH
SHDN 15
+
–
5.5μA
LOCKOUT
COMPARATOR
×1
Q2
FREQUENCY
FOLDBACK
2
SW
V C(MAX)
CLAMP
Q3
FOLDBACK
CURRENT
LIMIT
CLAMP
ERROR
AMPLIFIER
g m = 2000μMho
12 FB
2.38V
11
V C
1.22V
GND
1, 8, 9, 16, 17
1766 F01
Figure 1. LT1766 Block Diagram
1766fc
9
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1766IGN-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:5.5V to 60V 1.5A, 200kHz Step-Down Switching Regulator |
| LT1767 | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.4A, 500kHz Step-Down Switching Regulator |
| LT1767-1.8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators |
| LT1767-2.5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators |
| LT1767-3.3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators |
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