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| 型号： | LT3437EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/28页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.5A 16TSSOP |
| 标准包装： | 95 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 54 V |
| 输入电压： | 3.3 V ~ 60 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 200kHz |
| 电流 - 输出： | 500mA |
| 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-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 16-TSSOP-EP |
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LT3437
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the –40 ° C to 140 ° C
temperature range, otherwise specifications are at T J = 25 ° C. V IN = 12V, SHDN = 12V, BIAS = 5V, FB = 1.25V, C SS /SYNC = 0V unless
otherwise noted.
I VIN
Supply Quiescent Current
BIAS = 0V, FB = 1.15V, V C = 0.8V, SYNC = 2V
1.35
2
mA
Minimum BIAS Voltage (Note 5)
BIAS = 5V, FB = 1.15V, V C = 0.8V, SYNC = 2V
0.475
2.7
1
3.15
mA
V
I BIASS
I BIAS
BIAS Sleep Current (Note 4)
BIAS Quiescent Current
Minimum Boost Voltage (Note 6)
Input Boost Current (Note 7)
SYNC = 2V
I SW = 500mA
I SW = 0.5A
I SW = 0.25A
●
110
0.75
1.8
11
8
180
1
2.5
16
13
μ A
mA
V
mA
mA
V REF
Reference Voltage (V REF )
3.3V < V VIN < 60V
V VIN = 80V
●
●
1.212
1.190
1.25
1.25
1.288
1.288
V
V
I FB
FB Input Bias Current
EA Voltage Gain (Note 8)
EA Voltage g m
dI(V C )= ± 10 μ A
50
900
650
200
nA
V/V
μ Mho
EA Source Current
EA Sink Current
FB = 1.15V
FB = 1.35V
15
15
35
30
55
55
μ A
μ A
V C to SW g m
1
A/V
V C Switching Threshold
V SYNC = 2V
500
mV
V C High Clamp
1.5
1.75
2.1
V
I PK
SW Current Limit
●
400
650
900
mA
SW V CESAT
Switch Saturation Voltage
(Note 9)
Switching Frequency
I SW = 250mA
I SW = 500mA
●
●
●
140
200
400
200
400
800
240
mV
mV
kHz
Maximum Duty Cycle
95
%
Minimum SYNC Amplitude
SYNC Frequency Range
SYNC Input Impedance
240
1.5
50
2
500
V
kHz
k ?
I CSS
C SS Current Threshold (Note 10)
FB = 0V
4
10
16
μ A
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: The LT3437EDD/LT3437EFE are guaranteed to meet performance
specifications from 0 ° C to 125 ° C junction temperature. Specifications over
the –40 ° C to 125 ° C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls. The
LT3437IDD/LT3437IFE are guaranteed and tested over the full –40 ° C to
125 ° C operating junction temperature range. The LT3437HFE is also tested
to the LT3437 Electrical Characteristics table at 140 ° C operating junction
temperature. High junction temperatures degrade operating lifetimes.
Note 3: Minimum input voltage is defined as the voltage where switching
starts. Actual minimum input voltage to maintain a regulated output will
depend upon output voltage and load current. See Applications Information.
Note 4: Supply input current is the quiescent current drawn by the input
pin. Its typical value depends on the voltage on the BIAS pin and operating
state of the LT3437. With the BIAS pin at 0V, all of the quiescent current
BIAS voltage above its minimum input voltage, a portion of the total
quiescent current will be supplied by the BIAS pin. Supply sleep current is
defined as the quiescent current during the “sleep” portion of Burst Mode
operation. See Applications Information for determining application supply
currents.
Note 5: Minimum BIAS voltage is the voltage on the BIAS pin when I BIAS is
sourced into the pin.
Note 6: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 7: Boost current is the current flowing into the BOOST pin with the pin
held 3.3V above input voltage. It flows only during switch on time.
Note 8: Gain is measured with a V C swing from 1.15V to 750mV.
Note 9: Switch saturation voltage guaranteed by correlation to wafer level
measurements for DD package parts.
Note 10: The C SS threshold is defined as the value of current sourced into the
C SS pin which results in an increase in sink current from the V C pin. See the
Soft-Start section in Applications Information.
required to operate the LT3437 will be provided by the V IN pin. With the
3437fc
4
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相关代理商/技术参数 |
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| LT3437HFE | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage 500mA, 200kHz Step-Down Switching Regulator with 100μA Quiescent Current |
| LT3437HFE#PBF | 功能描述:IC REG BUCK ADJ 0.5A 16TSSOP 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 |
| LT3437HFE#TRPBF | 功能描述:IC REG BUCK ADJ 0.5A 16TSSOP 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: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 |
| LT3437IDD | 制造商:Linear Technology 功能描述:SP-SWREG/Monolithic, 60V, 500mA, 200kHz Step-down Converter w/ BurstMode |
| LT3437IDD#PBF | 功能描述:IC REG BUCK ADJ 0.5A 10DFN 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 |
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