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参数资料
| 型号： | LTC3878IGN#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 16-SSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 2MHz |
| 占空比： | 90% |
| 电源电压： | 4 V ~ 38 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 ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
LTC3878
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25°C. V IN = 15V unless otherwise noted.
SYMBOL
t OFF(MIN)
PARAMETER
Minimum Off-Time
CONDITIONS
I ON = 30μA
MIN
TYP
220
MAX
300
UNITS
ns
V SENSE(MAX)
Valley Current Sense Threshold
V PGND – V SW
Peak Current = Valley + Ripple
V RNG = 1V, V FB = 0.76V
V RNG = 0V, V FB = 0.76V
V RNG = INTV CC , V FB = 0.76V
l
l
l
108
74
152
133
93
186
165
119
224
mV
mV
mV
V SENSE(MIN)
Minimum Current Sense Threshold
V PGND – V SW
Forced Continuous Operation
V RNG = 1V, V FB = 0.84V
V RNG = 0V, V FB = 0.84V
V RNG = INTV CC , V FB = 0.84V
–67
–47
–93
mV
mV
mV
V RUN/SS
RUN/SS Pin On Threshold
V RUN/SS Rising
1.4
1.5
1.6
V
Soft-Start Charging Current
V RUN/SS = 0V
–1.2
μA
INTV CC(UVLO)
INTV CC(UVLOR)
INTV CC Undervoltage Lockout
INTV CC Undervoltage Lockout Release
Falling
Rising
l
l
3.3
3.6
3.9
4
V
V
TG Driver Pull-Up On-Resistance
TG Driver Pull-Down On-Resistance
BG Driver Pull-Up On-Resistance
BG Driver Pull-Down On-Resistance
TG Rise Time
TG Fall Time
BG Rise Time
BG Fall Time
TG High
TG Low
BG High
BG Low
C LOAD = 3300pF (Note 5)
C LOAD = 3300pF (Note 5)
C LOAD = 3300pF (Note 5)
C LOAD = 3300pF (Note 5)
2.5
1.2
2.5
0.7
20
20
20
20
Ω
Ω
Ω
Ω
ns
ns
ns
ns
TG/BG t 1D
TG/BG t 2D
Top Gate Off to Bottom Gate On Delay
Synchronous Switch-On Delay Time
Bottom Gate Off to Top Gate On Delay
Synchronous Switch-On Delay Time
C LOAD = 3300pf Each Driver (Note 5)
C LOAD = 3300pf Each Driver (Note 5)
15
15
ns
ns
Internal V CC Regulator
Internal V CC Voltage
Internal V CC Load Regulation
6V < V IN < 38V
I CC = 0mA to 20mA
5.15
5.3
–0.1
5.45
±2
V
%
PGOOD Output
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
V FB Rising
V FB Falling
V FB Returning
I PGOOD = 5mA
5.5
–5.5
7.5
–7.5
2
0.15
9.5
–9.5
3.5
0.4
%
%
%
V
PGOOD Turn-On Delay
12
μs
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: T J is calculated from the ambient temperature T A and power
dissipation P D as follows:
T J = T A + (P D ? 110°C/W)
Note 4: The LTC3878E is guaranteed to meet specifications from
0°C to 85°C. Specifications over the –40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls. The LTC3878I is guaranteed to meet
specifications over the full –40°C to 85°C operating temperature range.
Note 5: Rise and fall time are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 3: The LTC3878 is tested in a feedback loop that adjusts V FB to
achieve a specified error amplifier output voltage (I TH ).
3878fa
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| LTC3879EMSE#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-MSOP 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3879EMSE#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-MSOP 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3879EUD#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-QFN 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LTC3879EUD#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 16-QFN 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:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 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:24-WQFN 裸露焊盘 包装:带卷 (TR) |
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