参数资料
| 型号： | LT1738EG#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 20-SSOP |
| 标准包装： | 66 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 250kHz |
| 占空比： | 93.5% |
| 电源电压： | 2.55 V ~ 20 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 是 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
| 产品目录页面： | 1328 (CN2011-ZH PDF) |
LT1738
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V IN = 12V, V C = 0.9V, V FB = V REF , R VSL , R CSL = 16.9k, R T = 16.9k and
other pins open unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Oscillator and Sync
f MAX
Max Switch Frequency
250
kHz
f SYNC
Synchronization Frequency Range
Oscillator Frequency = 250kHz
290
kHz
V SYNC
R SYNC
SYNC Pin Input Threshold
SYNC Pin Input Resistance
q
0.7
1.4
40
2
k ?
Gate Drive
DC MAX
Maximum Switch Duty Cycle
R VSL = R CSL = 3.9k,
q
90
93.5
%
Osc Frequency = 25kHz
VG ON
VG OFF
IG SO
IG SK
V INUVLO
Gate On Voltage
Gate Off Voltage
Max Gate Source Current
Max Gate Sink Current
Gate Drive Undervoltage Lockout (Note 5)
V IN = 12, GCL = 12
V IN = 12, GCL = 8
V IN = 12V
V IN = 12V
V IN = 12V
V GCL = 6.5V
10
7.6
0.3
0.3
10.4
7.9
0.2
7.3
10.7
8.1
0.35
7.5
V
V
V
A
A
V
Current Sense
t IBL
Switch Current Limit Blanking Time
100
ns
V SENSE
Sense Voltage Shutdown Voltage
V C Pulled Low
q
86
103
120
mV
V SENSEF
Sense Voltage Fault Threshold
220
300
mV
Slew Control for the Following Slew Tests See Test Circuit in Figure 1b
V SLEWR
V SLEWF
VI SLEWR
VI SLEWF
Output Voltage Slew Rising Edge
Output Voltage Slew Falling Edge
Output Current Slew Rising Edge (CS pin V)
Output Current Slew Falling Edge (CS pin V)
R VSL = R CSL = 17k
R VSL = R CSL = 17k
R VSL = R CSL = 17k
R VSL = R CSL = 17k
26
19
2.1
2.1
V/ μ s
V/ μ s
V/ μ s
V/ μ s
Supply and Protection
V INMIN
Minimum Input Voltage (Note 4)
V GCL = V IN
q
2.55
3.6
V
I VIN
Supply Current (Note 3)
R VSL = R CSL = 17k
V IN = 12
q
12
40
mA
R VSL = R CSL = 17k
V IN = 20
35
55
mA
V SHDN
? V SHDN
I SHDN
V5
IV5 SC
Shutdown Turn-On Threshold
Shutdown Turn-On Voltage Hysteresis
Shutdown Input Current Hysteresis
5V Reference Voltage
5V Reference Short-Circuit Current
6.5V ≤ V IN ≤ 20V, IV5 = 5mA
6.5V ≤ V IN ≤ 20V, IV5 = – 5mA
V IN = 6.5V Source
q
q
q
1.31
50
10
4.85
4.80
10
1.39
110
24
5
5
1.48
180
35
5.20
5.15
V
mV
μ A
V
V
mA
V IN = 6.5V Sink
–10
mA
Note 1: Absolute Maximum Ratings are those values beyond which the
life of a device may be impaired.
Note 2: Supply current specification includes loads on each gate as in
Figure 1a. Actual supply currents vary with operating frequency, operating
voltages, V5 load, slew rates and type of external FET.
Note 3: The LT1738E is guaranteed to meet performance specifications
from 0 ° C to 70 ° C. Specifications from –40 ° C to 125 ° C are assured by
design, characterization and correlation with statistical process
controls.The LT1738I is guaranteed and tested to meet performance
specifications from – 40 ° C to 125 ° C.
Note 4: Output gate drive is enabled at this voltage. The GCL voltage will
also determine driver activity.
Note 5: Gate drive is ensured to be on when V IN is greater than max value.
1738fa
3
相关PDF资料 |
PDF描述 |
|---|---|
| LT1761IS5-2.5#TRMPBF | IC REG LDO 2.5V .1A TSOT23-5 |
| LT1762EMS8-3.3#TR | IC REG LDO 3.3V .15A 8MSOP |
| LT1763MPDE-2.5#PBF | IC REG LDO 2.5V .5A 12-DFN |
| LT1764AMPQ#TRPBF | IC REG LDO ADJ 3A DDPAK-5 |
| LT1765EFE-1.8 | IC REG BUCK 1.8V 3A 16TSSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1738IG | 功能描述:IC REG CTRLR PWM CM 20-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LT1738IG#PBF | 功能描述:IC REG CTRLR PWM CM 20-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LT1738IG#PBF | 制造商:Linear Technology 功能描述:ICSMPS CONTROLLERCURRENT-MODESSOP20P 制造商:Linear Technology 功能描述:IC,SMPS CONTROLLER,CURRENT-MODE,SSOP,20P |
| LT1738IG#TR | 功能描述:IC REG CTRLR PWM CM 20-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LT1738IG#TRPBF | 功能描述:IC REG CTRLR PWM CM 20-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
发布紧急采购，3分钟左右您将得到回复。