RH1185AMK_15 Datasheet, PDF (2/2 Pages) Linear Technology – Negative Regulator with Adjustable Current Limit

DICE/DWF SPECIFICATION
RH1185AMK
DICE/DWF ELECTRICAL TEST LIMITS V_IN = 7.4V, V_OUT = 5V, I_OUT = 1mA, R_LIM = 4.02k,
unless otherwise noted.
Note 3: Dropout voltage is tested by reducing input voltage until the
output drops 1% below its nominal value. Tests are done at 0.5A and 3A.
The power transistor looks basically like a pure resistance in this range
so that minimum differential at any intermediate current can be calculated
by interpolation; V_DROPOUT = 0.25V + 0.25Ω • I_OUT. For load current other
than 0.5A and 3.0A, see the graph in the LT1185 data sheet.
Note 4: Minimum input voltage is limited by base emitter voltage drive of
the power transistor section, not saturation as measured in Note 3. For
output voltages below 4V, minimum input voltage specification may limit
dropout voltage before transistor saturation limit.
Note 5: Supply current is measured on the ground pin, and does not
include load current, R_LIM, or output divider current.
Note 6: Line regulation is measured on a pulse basis with a pulse
width of ≈2ms to minimize heating. DC regulation will be affected by
thermal regulation and temperature coefficient of the reference. See the
Applications Information section of the LT1185 data sheet for details.
Note 7: External current limit is programmed with a resistor from REF pin
to GND pin. The value is 15K • A/I_LIMIT.
Note 8: For V_IN – V_OUT = 1.5V, V_IN = 5V and V_OUT = 3.5V. For all other
current limit tests V_OUT = 1V.
Wafer level testing is performed per the indicated specifications for dice. Considerable differences in performance can often be observed for dice versus
packaged units due to the influences of packaging and assembly on certain devices and/or parameters. Please consult factory for more information
on dice performance and lot qualifications via lot sampling test procedures.
Dice data sheet subject to change. Please consult factory for current revision in production.
I.D.No. 66-13-1185AMK
2
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
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LT 1111 REV C • PRINTED IN USA
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