參數(shù)資料
型號： LTC1698EGN
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： Isolated Secondary Synchronous Rectifier Controller
中文描述： SWITCHING CONTROLLER, PDSO16
封裝： 0.150 INCH, PLASTIC, SSOP-16
文件頁數(shù)： 3/24頁
文件大?。?/td> 1047K
代理商： LTC1698EGN
3
LTC1698
1698f
The
G
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)
ELECTRICAL CHARACTERISTICS
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.
SYMBOL PARAMETER
V
AUX
V
AUX
Auxiliary Supply Voltage
Current Limit Amplifier
I
ISNSGND
I
SNSGND
Input Current
I
ISNS
I
SNS
Input Current
V
ILIMTH
Current Limit Threshold
(V
ISNS
– V
ISNSGND
)
I
ICOMP
I
COMP
Source Current
CONDITIONS
MIN
TYP
MAX
UNITS
C
VAUX
= 0.1
μ
F, I
LOAD
= 0mA to 10mA, V
DD
= 7V to 12.6V
G
3.135
3.320
3.465
V
V
ISNSGND
= 0V
V
ISNS
= 0V
V
ICOMP
= 2.5V, V
ISNSGND
= 0V
G
0.05
0.05
–25
–25
–200
–200
200
200
3.5
1
1
μ
A
μ
A
mV
mV
μ
A
μ
A
μ
A
μ
A
G
–27.0
–27.5
–280
–370
120
80
2.2
–23.0
–22.5
–120
–80
280
370
5
G
V
ISNSGND
= 0V, V
ISNS
= –0.3V, V
ICOMP
= 2.5V (Note 8)
G
I
COMP
Sink Current
V
ISNSGND
= 0V, V
ISNS
= 0.3V, V
ICOMP
= 2.5V (Note 8)
G
g
mILIM
Current Limit Amplifier
Transconductance
Current Limit Amplifier
Open-Loop DC Gain
PWRGD and OVP Comparators
V
PWRGD
Percent Below V
FB
I
PWRGD
Power Good Sink Current
V
ISNSGND
= 0V, V
ICOMP
= 2.5V, I
ICOMP
=
±
10
μ
A
G
millimho
G
ICOMP
V
ICOMP
= 2.5V, No Load
G
48
60
dB
V
FB
↓
, MARGIN = Open (Note 9)
V
FB
= 2V
V
FB
= 0V
I
PWRGD
= 3mA, V
FB
= 0V
V
FB
= V
ISNS
= V
ISNSGND
= 0V, OVPIN
↑
(Note 9)
V
OVPIN
= 1.233V
V
FB
↑
V
FB
↓
V
OVPIN
↑
, C
OPTODRV
= 0.1
μ
F
G
–9
–6
–3
10
%
μ
A
mA
G
G
10
V
OL
V
OVPREF
I
OVPIN
t
PWRGD
Power Good Output Low Voltage
OVPIN Threshold
OVPIN Input Bias Current
Power Good Response Time
Power Bad Response Time
Overvoltage Response Time
SYNC and Drivers
V
PT
SYNC Input Positive Threshold
V
NT
SYNC Input Negative Threshold
I
SYNC
SYNC Input Current
f
SYNC
SYNC Frequency Range
t
d
SYNC Input to Driver Output Delay
t
SYNC
Minimum SYNC Pulse Width
t
r
, t
f
Driver Rise and Fall Time
G
0.4
1.28
1
5
2.5
20
V
V
G
1.18
1.233
0.1
2
1
5
G
μ
A
ms
ms
μ
s
G
G
1
0.5
t
OVP
G
G
1
1.6
–1.6
1
2.2
–1
50
400
90
V
V
G
–2.2
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,
10% to 90%
C
FG
= C
CG
= 1000pF, f
SYNC
= 100kHz, V
SYNC
=
±
5V
Measured from CG
↑
(Note 10)
G
μ
A
kHz
ns
ns
ns
G
50
G
40
G
75
G
10
40
t
DDIS
Driver Disable Time-Out
G
10
15
20
μ
s
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LTC1698EGN#PBF 功能描述:IC REG CTRLR ISO PWM CM 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC1698EGN#TR 功能描述:IC REG CTRLR ISO PWM CM 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC1698EGN#TRPBF 功能描述:IC REG CTRLR ISO PWM CM 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:4,500 系列:PowerWise® PWM 型:控制器 輸出數(shù):1 頻率 - 最大:1MHz 占空比:95% 電源電壓:2.8 V ~ 5.5 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名稱:LM1771SSDX
LTC1698ES 功能描述:IC REG CTRLR ISO PWM CM 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR)
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