LTC1702 Linear Technology, LTC1702 Datasheet - Page 3

• Manufacturer Part Number: LTC1702
• Description: Dual 550kHz Synchronous 2-Phase Switching Regulator Controller
• Manufacturer: Linear Technology

ELECTRICAL CHARACTERISTICS
The
V
SYMBOL
Switching Characteristics
f
DC
t
t
Feedback Amplifier
A
GBW
I
V
V
Current Limit Loop
A
I
Status Outputs
V
V
I
t
V
V
I
t
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: PV
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.
OSC
DC
DC
NOV
ERR
IMAX
PGOOD
PGOOD
FAULT
FAULT
r
, t
VFB
MIN
MAX
VILIM
PGOOD
OLPG
FAULT
OLF
CC
OSC2
MIN1
MIN2
MAX
f
= 5V unless otherwise specified. (Note 3)
denotes specifications which apply over the full operating temperature range, otherwise specifications are T A = 25 C.
CC
and BV
PARAMETER
Oscillator Frequency
Converter 2 Oscillator Phase
Minimum Duty Cycle
Minimum Duty Cycle
Maximum Duty Cycle
Driver Nonoverlap
Driver Rise/Fall Time
FB DC Gain
FB Gain Bandwidth
FB Sink/Source Current
MIN Comparator Threshold
MAX Comparator Threshold
I
I
PGOOD Trip Point
PGOOD Output Low Voltage
PGOOD Output Leakage
PGOOD Delay Time
FAULT Trip Point
FAULT Output Low Voltage
FAULT Output Current
FAULT Delay Time
LIM
MAX
Gain
CC
Source Current
(V
BOOST
– V
SW
) must be greater than V
GS(ON)
Test Circuit 1, C
CONDITIONS
Test Circuit 1, C
Relative to Converter 1 (Note 6)
V
V
Test Circuit 1, C
I
I
V
PGOOD = 1mA
V
V
I
V
V
MAX
MAX
FAULT
FB
FB
FB
FB
FB
FAULT
FB
< V
> V
Relative to Regulated V
< V
Relative to Regulated V
> V
= 0V, LTC1702C
= 0V, LTC1702I
of
= 1mA
= 0V
MAX
MAX
PGOOD
FAULT
to FAULT
to PGOOD
L
L
L
Note 5: Supply current in shutdown is dominated by external MOSFET
leakage and may be significantly higher than the quiescent current drawn
by the LTC1702, especially at elevated temperature.
Note 6: This parameter is guaranteed by correlation and is not tested
directly.
Note 7: Rise and fall times are measured using 10% and 90% levels. Delay
and nonoverlap times are measured using 50% levels.
= 0pF
= 2000pF (Note 7)
= 2000pF (Note 7)
(Note 7)
OUT
OUT
(Note 7)
MIN
– 10
+ 10
475
815
– 7
– 7
87
74
7
0
3
0.03
0.03
TYP
550
180
760
840
–10
–10
100
+ 15
– 10
– 5
10
90
40
12
85
25
40
25
0.1
10
LTC1702
MAX
–13
–14
+ 20
750
100
785
0.1
0.1
– 2
93
80
1
UNITS
3
DEG
MHz
kHz
mA
mV
mV
dB
dB
ns
ns
%
%
%
%
%
A
A
V
A
V
A
s
s