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参数资料
| 型号： | LTC3890HUH#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 4/40页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 32-QFN |
| 标准包装： | 73 |
| 系列： | PolyPhase® |
| PWM 型： | 电流模式 |
| 输出数： | 2 |
| 频率 - 最大： | 850kHz |
| 占空比： | 99% |
| 电源电压： | 4 V ~ 60 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 ~ 150°C |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 包装： | 管件 |
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LTC3890
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T A = 25°C. V IN = 12V, V RUN1,2 = 5V, EXTV CC = 0V unless otherwise noted.
(Note 2)
SYMBOL
BG/TG t 1D
t ON(MIN)
PARAMETER
Bottom Gate Off to Top Gate On Delay
Top Switch-On Delay Time
Minimum On-Time
CONDITIONS
C LOAD = 3300pF Each Driver
(Note 7)
MIN
TYP
30
95
MAX
UNITS
ns
ns
INTV CC Linea r Regulator
V INTVCCVIN
V LDOVIN
V INTVCCEXT
V LDOEXT
V EXTVCC
Internal V CC Voltage
INTV CC Load Regulation
Internal V CC Voltage
INTV CC Load Regulation
EXTV CC Switchover Voltage
6V < V IN < 60V, V EXTVCC = 0V
I CC = 0mA to 50mA, V EXTVCC = 0V
6V < V EXTVCC < 13V
I CC = 0mA to 50mA, V EXTVCC = 8.5V
EXTV CC Ramping Positive
4.85
4.85
4.5
5.1
0.7
5.1
0.6
4.7
5.35
1.1
5.35
1.1
4.9
V
%
V
%
V
V LDOHYS
EXTV CC Hysteresis
250
mV
Oscillator an d Phase-Locked Loop
f 25kΩ
Programmable Frequency
R FREQ = 25k, PLLIN/MODE = DC Voltage
105
kHz
f 65kΩ
f 105kΩ
f LOW
f HIGH
Programmable Frequency
Programmable Frequency
Low Fixed Frequency
High Fixed Frequency
R FREQ = 65k, PLLIN/MODE = DC Voltage
R FREQ = 105k, PLLIN/MODE = DC Voltage
V FREQ = 0V, PLLIN/MODE = DC Voltage
V FREQ = INTV CC , PLLIN/MODE = DC Voltage
375
320
485
440
835
350
535
505
380
585
kHz
kHz
kHz
kHz
f SYNC
Synchronizable Frequency
PLLIN/MODE = External Clock
l
75
850
kHz
PGOOD1 and PGOOD2 Outputs
V PGL
I PGOOD
PGOOD Voltage Low
PGOOD Leakage Current
I PGOOD = 2mA
V PGOOD = 5V
0.2
0.4
±1
V
μA
V PG
PGOOD Trip Level
V FB with Respect to Set Regulated Voltage
V FB Ramping Negative
Hysteresis
V FB with Respect to Set Regulated Voltage
V FB Ramping Positive
Hysteresis
–13
7
–10
2.5
10
2.5
–7
13
%
%
%
%
t PG
Delay for Reporting a Fault
25
μs
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Ratings for extended periods may affect device reliability and
lifetime.
Note 2: The LTC3890 is tested under pulsed load conditions such that
T J ≈ T A . The LTC3890E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 125°C operating
junction temperature range are assured by design, characterization and
correlation with statistical process controls. The LTC3890I is guaranteed
over the –40°C to 125°C operating junction temperature range, the
LTC3890H is guaranteed over the –40°C to 150°C operating junction
temperature range and the LTC3890MP is tested and guaranteed over the
–55°C to 150°C operating junction temperature range.
High junction temperatures degrade operating lifetimes; operating lifetime
is derated for junction temperatures greater than 125°C. Note that the
maximum ambient temperature consistent with these specifications is
determined by specific operating conditions in conjunction with board
layout, the rated package thermal impedance and other environmental
factors.
Note 3: T J is calculated from the ambient temperature T A and power
dissipation P D according to the following formula:
T J = T A + (P D ? 34°C/W)
Note 4: The LTC3890 is tested in a feedback loop that servos V ITH1,2 to
a specified voltage and measures the resultant V FB . The specification at
85°C is not tested in production and is assured by design, characterization
and correlation to production testing at other temperatures (125°C for
the LTC3890E/LTC3890I, 150°C for the LTC3890H/LTC3890MP). For the
LTC3890MP, the specification at –40°C is not tested in production and is
assured by design, characterization and correlation to production testing
at –55°C.
Note 5: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications information.
Note 6: Rise and fall times are measured using 10% and 90% levels. Delay
times are measured using 50% levels.
Note 7: The minimum on-time condition is specified for an inductor
peak-to-peak ripple current ≥ 40% of I MAX (See Minimum On-Time
Considerations in the Applications Information section).
3890fc
4
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| LTC3890IGN-1#PBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3890IGN-1#TRPBF | 功能描述:IC REG CTRLR BUCK PWM CM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3890IGN-3#PBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM CM 28SSOP 制造商:Linear Technology 功能描述:DC-DC CONTROLLER BUCK 900KHZ 制造商:Linear Technology 功能描述:BUCK DUAL CNTRL 4-60V 850K 制造商:Linear Technology 功能描述:DC-DC CONTROLLER, BUCK, 900KHZ, SSOP-28 制造商:Linear Technology 功能描述:DC-DC CONTROLLER, BUCK, 900KHZ, SSOP-28; Primary Input Voltage:60V; No. of Outputs:2; No. of Pins:28; Operating Temperature Min:-40C; Operating Temperature Max:125C; Operating Temperature Range:-40C to +125C ;RoHS Compliant: Yes |
| LTC3890IGN-3#TRPBF | 制造商:Linear Technology 功能描述:IC REG CTRLR BUCK PWM CM 28SSOP |
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