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| 型号： | LT1576CS8-5#TR |
| 厂商： | Linear Technology |
| 文件页数： | 3/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 5V 1.5A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 5V |
| 输入电压： | 5 V ~ 25 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： | 0°C ~ 125°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 |
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LT1576/LT1576-5
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating temperature
range, otherwise specifications are T A , T J = 25 ° C, V IN = 15V, V C = 1.5V, Boost = V IN + 5V, switch open, unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Switch Duty Cycle (Note 10)
8
%
Switch Frequency
Switch Frequency Line Regulation
V C Set to Give 50% Duty Cycle
5V ≤ V IN ≤ 25V
q
q
180
160
200
0
220
240
0.15
kHz
kHz
%/ V
Frequency Shifting Threshold on FB Pin
Minimum Input Voltage (Note 3)
Minimum Boost Voltage (Note 4)
Boost Current (Note 5)
V IN Supply Current (Note 6)
BIAS Supply Current (Note 6)
Shutdown Supply Current
Lockout Threshold
Shutdown Thresholds
? f = 10kHz
I SW ≤ 1.5A
I SW = 0.5A
I SW = 1.5A
V BIAS = 5V
V BIAS = 5V
V SHDN = 0V, V IN ≤ 25V, V SW = 0V, V C Open
V C Open
V C Open Device Shutting Down
Device Starting Up
q
q
q
q
q
q
q
q
q
q
q
0.4
2.34
0.13
0.25
0.74
5.0
2.3
9
27
0.55
1.6
20
2.42
0.37
0.45
1.0
5.5
3.0
18
50
0.8
2.2
50
75
2.50
0.60
0.7
V
V
V
mA
mA
mA
mA
μ A
μ A
V
V
V
Synchronization Threshold
Synchronizing Range
SYNC Pin Input Resistance
250
1.5
40
2.2
400
V
kHz
k ?
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Gain is measured with a V C swing equal to 200mV above the
switching threshold 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 defined as the voltage where internal bias lines are still
regulated so that the reference voltage and oscillator frequency remain
constant. Actual minimum input voltage to maintain a regulated output will
depend on 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 flowing into the boost pin with the pin
held 5V above input voltage. It flows only during switch on time.
Note 7: Switch on resistance is calculated by dividing V IN to V SW voltage
by the forced current (1.5A). See Typical Performance Characteristics for
the graph of switch voltage at other currents.
Note 8: Transconductance and voltage gain refer to the internal amplifier
exclusive of the voltage divider. To calculate gain and transconductance,
refer to the SENSE pin on the fixed voltage parts. Divide values shown by
the ratio V OUT /1.21.
Note 9: Slope compensation is the current subtracted from the switch
current limit at 80% duty cycle. See Maximum Output Load Current in the
Applications Information section for further details.
Note 10: Minimum on-time is 400ns typical. For a 200kHz operating
frequency this means the minimum duty cycle is 8%. In frequency
foldback mode, the effective duty cycle will be less than 8%.
Note 6: V IN supply current is the current drawn when the BIAS pin is held
at 5V and switching is disabled. Total input referred supply current is
calculated by summing input supply current (I SI ) with a fraction of BIAS
supply current (I SB )
I TOT = I SI + (I SB )(V BIAS /V IN )(1.15)
with V IN = 15V, V BIAS = 5V, I SI = 0.55mA, I SB = 1.6mA and I TOT = 1.16mA.
If the BIAS pin is unavailable or open circuit, the sum of V IN and BIAS
supply currents will be drawn by the V IN pin.
3
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| LT1576CS8-SYNC | 功能描述:IC REG BUCK ADJ 1.5A 8SOIC 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 |
| LT1576CS8-SYNC#PBF | 功能描述:IC REG BUCK ADJ 1.5A 8SOIC 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 |
| LT1576CS8-SYNC#TR | 功能描述:IC REG BUCK ADJ 1.5A 8SOIC 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 |
| LT1576CS8-SYNC#TRPBF | 功能描述:IC REG BUCK ADJ 1.5A 8SOIC 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:20 系列:SIMPLE SWITCHER® 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:12V 输入电压:4 V ~ 60 V PWM 型:电压模式 频率 - 开关:52kHz 电流 - 输出:1A 同步整流器:无 工作温度:-40°C ~ 125°C 安装类型:通孔 封装/外壳:16-DIP（0.300"，7.62mm） 包装:管件 供应商设备封装:16-DIP 其它名称:*LM2575HVN-12LM2575HVN-12 |
| LT1576I | 制造商:LINER 制造商全称:Linear Technology 功能描述:1.5A, 200kHz Step-Down Switching Regulator |
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