Datasheet

LTC6902
3
6902f
V
+
Operating Supply Range ● 2.7 5.5 V
I
S
Power Supply Current R
SET
= 400k, R
L
= ∞, Pin 2 = V
+
(N = 100), f
OUT
= 5kHz
V
+
= 5V ● 0.35 0.55 mA
V
+
= 2.7V ● 0.32 0.50 mA
R
SET
= 20k, R
L
= ∞, Pin 2 = 0V (N = 1), f
OUT
= 10MHz
V
+
= 5V ● 2.35 3.50 mA
V
+
= 2.7V ● 1.40 1.80 mA
R
SET
= 400k, R
L
= ∞, Pin 2 = V
+
(N = 100), R
MOD
= 800k
V
+
= 5V ● 0.45 0.63 mA
V
+
= 2.7V ● 0.34 0.50 mA
R
SET
= 20k, R
L
= ∞, Pin 2 = 0V (N = 1), R
MOD
= 40k
V
+
= 5V ● 2.50 3.60 mA
V
+
= 2.7V ● 1.40 1.90 mA
V
IH_DIV
High Level DIV Input Voltage ● V
+
– 0.4 V
V
IL_DIV
Low Level DIV Input Voltage ● 0.4 V
I
DIV
DIV Input Current (Note 6) Pin 2 = V
+
, V
+
= 5V ● 2 4 µA
Pin 2 = 0V, V
+
= 5V ● –4 –2 µA
V
IH_PH
High Level PH Input Voltage ● V
+
– 0.4 V
V
IL_PH
Low Level PH Input Voltage ● 0.4 V
I
PH
PH Input Currrent (Note 6) Pin 3 = V
+
, V
+
= 5V ● 2 4 µA
Pin 3 = 0V, V
+
= 5V ● –4 –2 µA
V
OH
High Level Output Voltage (Note 6) V
+
= 5V I
OH
= –1mA ● 4.75 4.90 V
(OUT1, OUT2, OUT3, OUT4) I
OH
= –4mA ● 4.40 4.70 V
V
+
= 2.7V I
OH
= –1mA ● 2.35 2.6 V
I
OH
= –4mA ● 1.85 2.2 V
V
OL
Low Level Output Voltage (Note 6) V
+
= 5V I
OL
= 1mA ● 0.05 0.15 V
(OUT1, OUT2, OUT3, OUT4) I
OL
= 4mA ● 0.20 0.40 V
V
+
= 2.7V I
OL
= 1mA ● 0.1 0.3 V
I
OL
= 4mA ● 0.4 0.7 V
t
r
Output Rise Time (Note 7) V
+
= 5V Pin 2 = V
+
or Open (N = 100 or N = 10) 14 ns
(OUT1, OUT2, OUT3, OUT4) Pin 2 = 0V (N = 1) 7 ns
V
+
= 2.7V Pin 2 = V
+
or Open (N = 100 or N = 10) 19 ns
Pin 2 = 0V (N = 1) 11 ns
t
f
Output Fall Time (Note 7) V
+
= 5V Pin 2 = V
+
or Open (N = 100 or N = 10) 13 ns
(OUT1, OUT2, OUT3, OUT4) Pin 2 = 0V (N = 1) 6 ns
V
+
= 2.7V Pin 2 = V
+
or Open (N = 100 or N = 10) 19 ns
Pin 2 = 0V (N = 1) 10 ns
Spread Spectrum Frequency V
+
= 5V, N = 10, R
SET
= 20k, R
MOD
= 10k ● 35 40 45.0 %
Modulation Spreading Percentage V
+
= 5V, N = 10, R
SET
= 20k, R
MOD
= 40k ● 7.5 10 12.5 %
(Downspread from Maximum V
+
= 2.7V, N = 10, R
SET
= 20k, R
MOD
= 10k ● 35 40 45.0 %
Frequency) V
+
= 2.7V, N = 10, R
SET
= 20k, R
MOD
= 40k ● 7.5 10 12.5 %
Percent = 100 • (f
MAX
– f
MIN
)/f
MAX
(Note 8)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
+
= 2.7V to 5.5V, R
L
= 5k, C
L
= 5pF, Pin 3 (PH) = 0V (2-phase, M = 1)
unless otherwise specified. Pin 9 (MOD) is at 0V unless otherwise specified. R
SET
is defined as a resistor connected from the SET pin
to the V
+
pin. R
MOD
is defined as a resistor connected from the MOD pin to the V
+
pin.
ELECTRICAL CHARACTERISTICS
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