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| 型号： | LTC1698EGN#TR |
| 厂商： | Linear Technology |
| 文件页数： | 3/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR ISO PWM CM 16-SSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 400kHz |
| 电源电压： | 6 V ~ 12.6 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： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SSOP（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 其它名称： | LTC1698EGNTR |
LTC1698
ELECTRICAL CHARACTERISTICS The q indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T A = 25 ° C. V DD = 8V, unless otherwise noted. (Note 4)
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V AUX
V AUX
Auxiliary Supply Voltage
C VAUX = 0.1 μ F, I LOAD = 0mA to 10mA, V DD = 7V to 12.6V
q
3.135
3.320
3.465
V
Current Limit Amplifier
I ISNSGND I SNSGND Input Current
V ISNSGND = 0V
q
0.05
1
μ A
I ISNS
V ILIMTH
I SNS Input Current
Current Limit Threshold
(V ISNS – V ISNSGND )
V ISNS = 0V
V ICOMP = 2.5V, V ISNSGND = 0V
q
q
– 27.0
– 27.5
0.05
– 25
– 25
1
– 23.0
– 22.5
μ A
mV
mV
I ICOMP
g mILIM
I COMP Source Current
I COMP Sink Current
Current Limit Amplifier
V ISNSGND = 0V, V ISNS = – 0.3V, V ICOMP = 2.5V (Note 8)
V ISNSGND = 0V, V ISNS = 0.3V, V ICOMP = 2.5V (Note 8)
V ISNSGND = 0V, V ICOMP = 2.5V, I ICOMP = ± 10 μ A
q
q
q
– 280
– 370
120
80
2.2
– 200
– 200
200
200
3.5
– 120
– 80
280
370
5
μ A
μ A
μ A
μ A
millimho
Transconductance
G ICOMP
Current Limit Amplifier
V ICOMP = 2.5V, No Load
q
48
60
dB
Open-Loop DC Gain
PWRGD and OVP Comparators
V PWRGD
I PWRGD
Percent Below V FB
Power Good Sink Current
V FB ↓ , MARGIN = Open (Note 9)
V FB = 2V
q
q
–9
–6
–3
10
%
μ A
V FB = 0V
q
10
mA
V OL
Power Good Output Low Voltage
I PWRGD = 3mA, V FB = 0V
q
0.4
V
V OVPREF OVPIN Threshold
V FB = V ISNS = V ISNSGND = 0V, OVPIN ↑ (Note 9)
q
1.18
1.233
1.28
V
I OVPIN
OVPIN Input Bias Current
V OVPIN = 1.233V
q
0.1
1
μ A
t PWRGD
t OVP
Power Good Response Time
Power Bad Response Time
Overvoltage Response Time
V FB ↑
V FB ↓
V OVPIN ↑ , C OPTODRV = 0.1 μ F
q
q
q
1
0.5
2
1
5
5
2.5
20
ms
ms
μ s
SYNC and Drivers
V PT
V NT
SYNC Input Positive Threshold
SYNC Input Negative Threshold
q
q
1
– 2.2
1.6
–1.6
2.2
–1
V
V
I SYNC
f SYNC
t d
t SYNC
t r , t f
SYNC Input Current
SYNC Frequency Range
SYNC Input to Driver Output Delay
Minimum SYNC Pulse Width
Driver Rise and Fall Time
V SYNC = ± 10V
C FG = C CG = 1000pF, V SYNC = ± 5V
C FG = C CG = 1000pF, f SYNC = 100kHz, V SYNC = ± 5V
f SYNC = 100kHz, V SYNC = ± 10V (Note 6)
C FG = C CG = 1000pF, f SYNC = 100kHz, V SYNC = ± 5V,
q
q
q
q
q
50
75
1
40
10
50
400
90
40
μ A
kHz
ns
ns
ns
10% to 90%
t DDIS
Driver Disable Time-Out
C FG = C CG = 1000pF, f SYNC = 100kHz, V SYNC = ± 5V
Measured from CG ↑ (Note 10)
q
10
15
20
μ s
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired. All voltages refer to GND.
Note 2: The LTC1698 incorporates a 5V linear regulator to power internal
circuitry. Driving these pins above 5.3V may cause excessive current flow.
Guaranteed by design and not subject to test.
Note 3: The LTC1698E 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. For guaranteed performance to
specifications over the –40 ° C to 85 ° C range, the LTC1698I is available.
Note 4: All currents into device pins are positive; all currents out of the
device pins are negative. All voltages are referenced to ground unless
otherwise specified. For applications with V DD < 7V, refer to the Typical
Performance Characteristics.
Note 5: Supply current in active operation is dominated by the current
needed to charge and discharge the external FET gates. This will vary with
the LTC1698 operating frequency, supply voltage and the external FETs
used.
Note 6: This parameter is guaranteed by correlation and is not tested.
Note 7: V FB is tested in an op amp feedback loop which servos V FB to the
internal bandgap voltage.
Note 8: The current comparator output current varies linearly with
temperature.
Note 9: The PWRGD and OVP comparators incorporate 10mV of
hysteresis.
Note 10: The driver disable time-out is proportional to the SYNC period
within the frequency synchronization range.
1698f
3
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| LTC1698ES | 功能描述:IC REG CTRLR ISO PWM CM 16-SOIC 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:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 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:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LTC1698ES#PBF | 功能描述:IC REG CTRLR ISO PWM CM 16-SOIC 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:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 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:8-TSSOP（0.173"，4.40mm 宽） 包装:带卷 (TR) |
| LTC1698ES#TR | 功能描述:IC REG CTRLR ISO PWM CM 16-SOIC 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 |
| LTC1698ES#TRPBF | 功能描述:IC REG CTRLR ISO PWM CM 16-SOIC 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 |
| LTC1698IGN | 功能描述:IC REG CTRLR ISO PWM CM 16-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 |
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