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參數(shù)資料
| 型號： | LTC1703 |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 通用總線功能 |
| 英文描述： | Synchronous 8-Bit Up/Down Binary Counters 24-PDIP 0 to 70 |
| 中文描述： | 雙550kHz的同步二相開關(guān)穩(wěn)壓控制器5位VID |
| 文件頁數(shù)： | 3/36頁 |
| 文件大?。?/td> | 343K |
| 代理商： | LTC1703 |
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3
LTC1703
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
PV
CC
and BV
CC
(V
BOOST
– V
SW
) must be greater than V
GS(ON)
of
the external MOSFETs used to ensure proper operation.
Note 3:
All currents into device pins are positive; all currents out of device
pins are negative. All voltages are referenced to ground unless otherwise
specified.
Note 4:
Supply current in normal operation is dominated by the current
needed to charge and discharge the external MOSFET gates. This current
will vary with supply voltage and the external MOSFETs used.
Note 5:
Supply current in shutdown is dominated by external MOSFET
leakage and may be significantly higher than the quiescent current drawn
by the LTC1703, especially at elevated temperature.
Note 6:
This parameter is guaranteed by correlation and is not tested
directly.
Note 7:
Each built-in pull-up resistor attached to the VID inputs also has a
series diode connected to V
CC
to allow input voltages higher than the V
CC
supply without damage or clamping. (See Block Diagram.)
Note 8:
Feedback current at FB1 will be higher due to internal VID
resistors.
Note 9:
Rise and fall times are measured using 10% and 90% levels. Delay
and nonoverlap times are measured using 50% levels.
The
G
denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25
°
C.
V
CC
= 5V unless otherwise specified. (Note 3)
SYMBOL
PARAMETER
CONDITIONS
Switching Characteristics
V
OSC
Oscillator Amplitude
f
OSC
Oscillator Frequency
Test Circuit 1
Φ
OSC2
Controller 2 Oscillator Phase
Relative to Controller 1
DC
MIN1
Minimum Duty Cycle
V
FB
< V
MAX
DC
MIN2
Minimum Duty Cycle
V
FB
> V
MAX
DC
MAX
Maximum Duty Cycle
t
NOV
Driver Nonoverlap
Test Circuit 1 (Note 9)
t
r
, t
f
Driver Rise/Fall Time
Test Circuit 1 (Note 9)
Feedback Amplifier
A
VFB
FB DC Gain
GBW
FB Gain Bandwidth
I
ERR
FB Sink/Source Current
COMP
N
Output
V
MIN
MIN Comparator Threshold
V
MAX
MAX Comparator Threshold
Current Limit Loop
A
VILIM
I
LIM
Gain
I
IMAX
I
MAX
Source Current
I
MAX
= 0V
Status Outputs
V
FAULT
FAULT Trip Point
V
FB
Relative to Regulated V
OUT
V
OLF
FAULT Output Low Voltage
I
FAULT
= 1mA
I
FAULT
FAULT Output Current
V
FAULT
= 0V
t
FAULT
FAULT Delay Time
V
FB
> V
FAULT
to FAULT (Note 9)
VID Inputs
R11
Resistance Between SENSE and FB1
V
OUT
Error %
Output Voltage Accuracy (Side 1)
Programmed from 0.9V to 2V
R
PULLUP
VID Input Pull-Up Resistance
V
DIODE
= 0.6V (Note 7)
VID
T
VID Input Voltage Threshold
V
IL
(2.7V
≤
V
CC
≤
5.5V)
V
IH
(2.7V
≤
V
CC
≤
5.5V)
I
VID-LEAK
VID Input Leakage Current
V
CC
< VID < 7V (Note 7)
V
PULLUP
VID Pull-Up Voltage
V
CC
= 3.3V
V
CC
= 5V
ELECTRICAL CHARACTERISTICS
MIN
TYP
MAX
UNITS
1
V
P-P
kHz
DEG
G
475
550
180
10
750
G
7
0
%
%
%
ns
ns
G
G
87
90
40
12
93
100
80
G
G
G
74
85
25
±
10
760
840
dB
MHz
mA
mV
mV
G
±
3
G
785
G
815
40
–10
dB
μ
A
G
–7
–13
G
+10
+15
0.03
–10
25
+20
0.1
%
V
μ
A
μ
s
G
10
k
%
k
G
–1.5
1.5
40
0.4
V
V
1.6
0.01
2.8
4.5
±
1
μ
A
V
V
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| LTC1703CG | Synchronous 8-Bit Up/Down Binary Counters 24-PDIP 0 to 70 |
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| LTC1705 | Dual 550kHz Synchronous Switching Regulator Controller with 5-Bit VID and 150mA LDO |
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