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参数资料
| 型号： | LT1766IGN#TR |
| 厂商： | Linear Technology |
| 文件页数： | 5/30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
ELECTRICAL CHARACTERISTICS
(LT1766H Grade)
The l denotes speci?cations which apply over the full operating temperature range, otherwise speci?cations are at T J = 25°C.
V IN = 15V, V C = 1.5V, SHDN = 1V, BOOST open circuit, SW open circuit, unless otherwise noted.
PARAMETER
f SW Line Regulation
f SW Frequency Shifting Threshold
Minimum Input Voltage
Minimum Boost Voltage
Boost Current (Note 5)
Input Supply Current (I VIN )
Bias Supply Current (I BIAS )
Shutdown Supply Current
CONDITIONS
5.5V ≤ V IN ≤ 60V
Df = 10kHz
(Note 3)
(Note 4) I SW ≤ 0.75A
Boost = V IN + 5V, I SW = 0.5A
Boost = V IN + 5V, I SW = 0.75A
(Note 6) V BIAS = 5V
(Note 6) V BIAS = 5V
SHDN = 0V, V IN ≤ 60V, SW = 0V, V C Open
l
l
l
l
l
l
MIN
TYP
0.05
0.8
4.6
1.8
12
45
1.4
2.9
25
MAX
0.15
5.5
3
40
100
2.2
4.2
120
500
UNITS
%/V
V
V
V
mA
mA
mA
mA
μA
μA
Lockout Threshold
Shutdown Thresholds
Minimum SYNC Amplitude
V C Open
V C Open, Shutting Down
V C Open, Starting Up
l
l
l
l
2.3
0.15
0.25
2.42
0.37
0.45
1.5
2.68
0.9
0.9
2.2
V
V
V
V
SYNC Frequency Range
SYNC Input Resistance
228
20
700
kHz
kΩ
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: Gain is measured with a V C swing equal to 200mV above the low
clamp level to 200mV below the upper clamp level.
Note 3: Minimum input voltage is not measured directly, but is guaranteed
by other tests. It is de?ned as the voltage where internal bias lines are still
regulated so that the reference voltage and oscillator remain constant.
Actual minimum input voltage to maintain a regulated output will depend
upon output voltage and load current. See Applications Information.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 5: Boost current is the current ?owing into the BOOST pin with the
pin held 5V above input voltage. It ?ows only during switch on time.
Note 6: Input supply current is the quiescent current drawn by the input
pin when the BIAS pin is held at 5V with switching disabled. Bias supply
current is the current drawn by the BIAS pin when the BIAS pin is held
at 5V. Total input referred supply current is calculated by summing input
supply current (I VIN ) with a fraction of bias supply current (I BIAS ):
I TOTAL = I VIN + (I BIAS )(V OUT /V IN )
with V IN = 15V, V OUT = 5V, I VIN = 1.4mA, I BIAS = 2.9mA, I TOTAL = 2.4mA.
Note 7: Switch on-resistance is calculated by dividing V IN to SW voltage
by the forced current. See Typical Performance Characteristics for the
graph of switch voltage at other currents.
Note 8: The LT1766EGN, LT1766EGN-5, LT1766EFE and LT1766EFE-5
are guaranteed to meet performance speci?cations from 0°C to 125°C
junction temperature. Speci?cations over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LT1766IGN, LT1766IGN-5,
LT1766IFE and LT1766IFE-5 are guaranteed over the full –40°C to 125°C
operating junction temperature range. The LT1766HGN and LT1766HFE are
guaranteed over the full –40°C to 140°C operating junction temperature
range.
Note 9: Transconductance and voltage gain refer to the internal ampli?er
exclusive of the voltage divider. To calculate gain and transconductance,
refer to the SENSE pin on ?xed voltage parts. Divide the values shown by
the ratio V OUT /1.219.
Note 10: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 140°C when overtemperature protection is active.
Continuous operation above the speci?ed maximum operating junction
temperature may impair device reliability.
Note 11: High junction temperatures degrade operating lifetimes.
Operating lifetime at junction temperatures between 125°C and 140°C is
derated to 1000 hours.
1766fc
5
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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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