ltc1702a Linear Technology Corporation, ltc1702a Datasheet - Page 3

• Manufacturer Part Number: ltc1702a
• Description: Dual 550khz Synchronous 2-phase Switching Regulator Controller
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
The
V
SYMBOL
V
∆V
I
V
I
I
Switching Characteristics
f
Φ
DC
DC
t
t
Feedback Amplifier
A
GBW
I
Status Outputs
V
V
I
t
V
V
I
t
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
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.
FCB
SS
MAX
OSC
NOV
ERR
PGOOD
PGOOD
FAULT
FAULT
r
FCB
RUN
, t
VFB
PGOOD
OLPG
FAULT
OLF
CC
OSC2
FCB
MIN
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
FCB Threshold
FCB Feedback Hysteresis
FCB Pin Current
RUN/SS Pin RUN Threshold
Soft-Start Source Current
Maximum Soft-Start Sink Current
I
Oscillator Frequency
Converter 2 Oscillator Phase
Minimum Duty Cycle
Maximum Duty Cycle
Driver Nonoverlap
Driver Rise/Fall Time
FB DC Gain
FB Gain Bandwidth
FB Sink/Source Current
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
MAX
CC
Source Current
(V
BOOST
– V
SW
) must be greater than V
GS(ON)
Test Circuit 1, C
CONDITIONS
RUN/SS n = 0V
V
V
Test Circuit 1, C
Relative to Converter 1 (Note 6)
Test Circuit 1, C
V
PGOOD = 1mA
V
V
I
V
V
FAULT
IMAX
IMAX
FB
FB
FB
FAULT
FB
Relative to Regulated V
< V
Relative to Regulated V
> V
of
= 0V, V
= 0V
= 1mA
= 0V
PGOOD
FAULT
to FAULT
SW
to PGOOD
L
L
L
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 LTC1702A, 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.
= – 0.5V
= 0pF
= 2000pF (Note 7)
= 2000pF (Note 7)
(Note 7)
OUT
OUT
(Note 7)
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
0.75
0.45
MIN
–12
475
–10
– 2
±3
87
74
10
0
±0.001
– 3.5
±0.1
0.55
0.03
0.03
TYP
–10
550
180
±10
100
–10
0.8
– 5
20
90
40
12
85
25
15
25
1
LTC1702A
MAX
0.85
0.65
750
100
0.1
0.1
±1
– 6
– 8
– 2
±1
93
80
20
UNITS
1702afa
3
DEG
MHz
kHz
mV
mA
mA
µA
µA
µA
dB
µA
µA
ns
ns
µs
µs
%
%
%
%
V
V
V
V