lm26480sqx-bf National Semiconductor Corporation, lm26480sqx-bf Datasheet - Page 7

• Manufacturer Part Number: lm26480sqx-bf
• Description: Lm26480 Externally Programmable Dual High-current Step-down Dc/dc And Dual Linear Regulators
• Manufacturer: National Semiconductor Corporation

Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation
of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated test conditions,
see the Electrical Characteristics.
Note 2: All voltages are with respect to the potential at the GND pin.
Note 3: Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
= 140°C (typ.)
Note 4: The Human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor into each pin. (MILSTD - 883 3015.7)
Note 5: In applications where high power dissipation and/or poor package thermal resistance is present, the maximum ambient temperature may have to be
derated. Maximum ambient temperature (T
dissipation of the device in the application (P
following equation: T
Note 6: Junction-to-ambient thermal resistance is highly application and board-layout dependent. In applications where high maximum power dissipation exists,
special care must be paid to thermal dissipation issues in board design.
Note 7: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical numbers are not guaranteed, but do represent the most likely norm.
Note 8: C
Note 9: The device maintains a stable, regulated output voltage without a load.
Note 10: Dropout voltage is the voltage difference between the input and the output at which the output voltage drops to 100 mV below its nominal value.
Note 11: Quiescent current is defined here as the difference in current between the input voltage source and the load at V
Note 12: V
Note 13: This specification is guaranteed by design.
Note 14: V
Note 15: Pins 24, 19 can operate from V
to use a lower voltage rating if the input voltage comes from a buck output.
Note 16: VPOR is voltage at which the EPROM resets. This is different from the UVLO on VINLDO12, which is the voltage at which the regulators shut off; and
is also different from the nPOR function, which signals if the regulators are in a specified range.
IN
IN
IN
, C
minimum for line regulation values is 1.8V.
≥
OUT
V
OUT
: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics.
A-MAX
+ R
DSON
= T
J-MAX-OP
(P) (I
OUT
− (θ
+ 1/2 I
IN
JA
min of 1.74V to a V
A-MAX
D-MAX
× P
RIPPLE
) is dependent on the maximum operating junction temperature (T
D-MAX
), and the junction-to-ambient thermal resistance of the part/package in the application (θ
). If these conditions are not met, voltage regulation will degrade as load increases.
). See Applications section.
IN
max of 5.5V. This rating is only for the series pass PMOS power FET. It allows the system design
7
J-MAX-OP
J
OUT
= 125°C), the maximum power
= 160°C (typ.) and disengages at T
.
JA
), as given by the
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J