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| 型号： | LTC1909-8EG |
| 厂商： | Linear Technology |
| 文件页数： | 4/32页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BUCK PWM CM 28-SSOP |
| 标准包装： | 47 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 200kHz |
| 占空比： | 90% |
| 电源电压： | 4 V ~ 36 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： | 28-SSOP（0.209"，5.30mm 宽） |
| 包装： | 管件 |
| 其它名称： | LTC19098EG |
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LTC1909-8
ELECTRICAL CHARACTERISTICS
(SMBus VID Programmer) The q denotes the specifications which apply over the full operating temperature range, otherwise
specifications are at T A = 25 ° C. 2.7V ≤ V CC ≤ 5.5V (Note 5) unless otherwise stated.
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
I SK1
SDA, PGTMR, CPUON
0 ≤ V PIN ≤ 2.7V
q
5
19
60
mA
Sink Current at V CC = 2.7V
I SK2
SDA, PGTMR, CPUON
0 ≤ V PIN ≤ 5.5V
q
35
65
150
mA
Sink Current at V CC = 5.5V
I LKG
PGTMR, CPUON Leakage Current
0 ≤ V PIN ≤ 5.5V
± 0.2
μ A
I PU
VRON Pull-Up Current
V PIN = 0
q
–1
– 2.5
–7
μ A
Timing (Note 7)
f SMB
t BUF
t HD:STA
t SU:STA
t SU:STO
t HD:DAT
t SU:DAT
t LOW
t HIGH
SMBus Operating Frequency
Bus Free Time Between Stop/Start
Hold Time After (Repeated) Start
Repeated Start Setup Time
Stop Condition Setup Time
Data Hold Time
Data Setup Time
Clock Low Period
Clock High Period
q
q
q
q
q
q
q
q
q
10
4.7
4
4.7
4
300
250
4.7
4
100
KHz
μ s
μ s
μ s
μ s
ns
ns
μ s
μ s
t f
t r
t SSH
SCL, SDA Fall Time
SCL, SDA Rise Time
SEL to V OSENSE High (Note 8)
0.9V CC to 0.65V
0.65V to 2.25V
Toggle SEL to Switch from 01111B to 10000B,
q
q
q
500
300
1000
ns
ns
ns
V FB = 0.8V
t SSL
SEL to V OSENSE Low (Note 8)
Toggle SEL to Switch from 10000B to 01111B,
q
500
ns
V FB = 0.8V
t SPL
t PH
t PL
t PPL
t VH
t VL
t VPL
t PGL
SEL Toggling to PGTMR Low
Stop Bit to CPUON High (Note 9)
Stop Bit to CPUON Low (Note 9)
Stop Bit to PGTMR Low (Note 9)
VRON High to CPUON High
VRON Low to CPUON Low
VRON Low to PGTMR Low
PGTMR Low Duration
Toggle SEL to Select New Code
C L = 100pF, 10k ? Pull-Up, S2 in Test Circuit
C L = 100pF, 10k ? Pull-Up, S2 in Test Circuit
C L = 0.1 μ F, 10k ? Pull-Up, S1 in Test Circuit
C L = 100pF, 10k ? Pull-Up, S2 in Test Circuit
C L = 100pF, 10k ? Pull-Up, S2 in Test Circuit
C L = 0.1 μ F, 10k ? Pull-Up, S1 in Test Circuit
C L = 100pF, 10k ? Pull-Up, S2 in Test Circuit
C L = 100pF, 10k ? Pull-Up, S2 in Test Circuit
q
q
q
q
q
q
q
30
160
20
130
50
500
2
50
250
2
50
500
70
ns
μ s
μ s
ns
μ s
μ s
ns
μ s
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LTC1909-8E is guaranteed to meet performance specifications
from 0 ° C to 70 ° C. Specifications over the –40 ° C to 85 ° C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3: The LTC1909-8 is tested in a feedback loop that adjusts V FB to
achieve a specified error amplifier output voltage (I TH ).
Note 4: T J is calculated from the ambient temperature T A and power
dissipation P D as follows:
LTC1909-8E: T J = T A + (P D ? 130 ° C/W)
Note 5: All currents into device pins are positive; all currents out of device pins
are negative. All voltages are referenced to device ground unless otherwise
noted.
Note 6: The divider error is tested in a feedback loop that adjusts FB to
0.8V for each 5-bit code.
Note 7: These parameters are guaranteed by design and are not tested in
production. SMBus timing is referenced to V IL and V IH levels.
Note 8: Dominated by the switching regulator. The delay due to the SMBus
VID programmer is only 500ns typ.
Note 9: Measured from the rising edge of SDA during Data High
acknowledgment.
19098f
4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 74HC273DB | 功能描述:触发器 OCTAL D-TYPE RoHS:否 制造商:Texas Instruments 电路数量:2 逻辑系列:SN74 逻辑类型:D-Type Flip-Flop 极性:Inverting, Non-Inverting 输入类型:CMOS 输出类型: 传播延迟时间:4.4 ns 高电平输出电流:- 16 mA 低电平输出电流:16 mA 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:X2SON-8 封装:Reel |
| 74HC273DB,112 | 功能描述:触发器 OCTAL D-TYPE RoHS:否 制造商:Texas Instruments 电路数量:2 逻辑系列:SN74 逻辑类型:D-Type Flip-Flop 极性:Inverting, Non-Inverting 输入类型:CMOS 输出类型: 传播延迟时间:4.4 ns 高电平输出电流:- 16 mA 低电平输出电流:16 mA 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:X2SON-8 封装:Reel |
| 74HC273DB,118 | 功能描述:触发器 OCTAL D-TYPE RoHS:否 制造商:Texas Instruments 电路数量:2 逻辑系列:SN74 逻辑类型:D-Type Flip-Flop 极性:Inverting, Non-Inverting 输入类型:CMOS 输出类型: 传播延迟时间:4.4 ns 高电平输出电流:- 16 mA 低电平输出电流:16 mA 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:X2SON-8 封装:Reel |
| 74HC273DBT | 制造商:NXP Semiconductors 功能描述:HC/UH SERIES, POSITIVE EDGE TRIGGERED D FLIP-FLOP, TRUE OUTPUT, 20 Pin Plastic SMT |
| 74HC273DB-T | 功能描述:触发器 OCTAL D-TYPE RoHS:否 制造商:Texas Instruments 电路数量:2 逻辑系列:SN74 逻辑类型:D-Type Flip-Flop 极性:Inverting, Non-Inverting 输入类型:CMOS 输出类型: 传播延迟时间:4.4 ns 高电平输出电流:- 16 mA 低电平输出电流:16 mA 电源电压-最大:5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:X2SON-8 封装:Reel |
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