LTC1266_15 Datasheet, PDF (4/20 Pages) Linear Technology – Synchronous Regulator Controller for N- or P-Channel MOSFETs

LTC1266
LTC1266-3.3/LTC1266-5
ELECTRICAL CHARACTERISTICS –40°C < T_A < 85°C (Note 5), V_IN = 10V, unless otherwise noted.
SYMBOL
I_Q1
I_Q2
V_SENSE1
V_SENSE2
V_SHDN
t_OFF
PARAMETER
V_IN Pin DC Supply Current (Note 3)
Normal Mode
Sleep Mode
Shutdown
PWR V_IN DC Supply Current (Note 3)
Normal Mode
Sleep Mode
Shutdown
Current Sense Threshold
(Burst Mode Operation Enabled)
LTC1266CS, LTC1266IS
LTC1266CS
LTC1266IS
LTC1266-3.3, LTC1266-5 (I and C)
LTC1266CS-3.3, LTC1266CS-5
LTC1266IS-3.3, LTC1266IS-5
Current Sense Threshold
(Burst Mode Operation Disabled)
LTC1266CS, LTC1266IS
LTC1266CS
LTC1266IS
LTC1266-3.3, LTC1266-5 (I and C)
LTC1266CS-3.3, LTC1266CS-5
LTC1266IS-3.3, LTC1266IS-5
Shutdown Pin Threshold
Off-Time (Note 4)
CONDITIONS
3.5V < V_IN < 18V
3.5V < V_IN < 18V
V_SHUTDOWN = 2.1V, 3.5V < V_IN < 18V
3.5V < PWR V_IN < 18V
3.5V < PWR V_IN < 18V
V_SHUTDOWN = 2.1V, 3.5V < PWR V_IN < 18V
V_BINH = 0V
V_SENSE– = 3.3V, V_FB = V_OUT/2.64 + 25mV (Forced)
V_SENSE– = 3.3V, V_FB = V_OUT/2.64 – 25mV (Forced)
V_SENSE– = 3.3V, V_FB = V_OUT/2.64 – 25mV (Forced)
V_SENSE– = V_OUT + 100mV (Forced)
V_SENSE– = V_OUT – 100mV (Forced)
V_SENSE– = V_OUT – 100mV (Forced)
V_BINH = 2.1V
V_SENSE– 3.3V, V_FB = V_OUT/2.64 + 25mV (Forced)
V_SENSE– 3.3V, V_FB = V_OUT/2.64 – 25mV (Forced)
V_SENSE– 3.3V, V_FB = V_OUT/2.64 – 25mV (Forced)
V_SENSE– = V_OUT + 100mV (Forced)
V_SENSE– = V_OUT – 100mV (Forced)
V_SENSE– = V_OUT – 100mV (Forced)
C Grade
I Grade
C_T = 390pF, I_LOAD = 700mA, C Grade
C_T = 390pF, I_LOAD = 700mA, I Grade
MIN TYP MAX UNITS
2.1 3.3
mA
170 260
µA
25 60
µA
20 50
µA
1
7
µA
1
7
µA
25
mV
135 155 180
mV
135 155 190
mV
25
mV
135 155 180
mV
135 155 190
mV
–20
mV
130 155 185
mV
130 155 195
mV
–20
mV
130 155 185
mV
130 155 195
mV
0.55 0.8 2
V
0.50 0.8 2
V
3.8 5 6.5
µs
3.8 5 7.0
µs
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: T_J is calculated from the ambient temperature T_A and power
dissipation P_D according to the following formula:
T_J = T_A + (P_D × 110°C/W)
Note 3: Dynamic supply current is higher due to the gate charge being
delivered at the switching frequency. See Applications Information.
Note 4: In applications where R_SENSE is placed at ground potential, the off-
time increases approximately 40%.
Note 5: The LTC1266CS, LTC1266CS-3.3, LTC1266-5 and LTC1266ACS
are not tested and not quality assurance sampled at – 40°C and 85°C.
These specifications are guaranteed by design and/or correlation. The
LTC1266IS, LTC1266IS-3.3, LTC1266IS-5 and LTC1266AIS are
guaranteed and tested over the – 40°C to 85°C operating temperature
range.
Note 6: Unless otherwise noted the specifications for the LTC1266A are
the same as those for the LTC1266.
Note 7: t_r and t_f are measured at 10% and 90% levels.
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