Datasheet

LM26484
SNVS573F –SEPTEMBER 2008–REVISED MARCH 2013 www.ti.com
Buck Converters SW1, SW2 (continued)
Unless otherwise noted, AVDD=AVIN=VIN1=VIN2 = 3.3V, C
IN
= 10 µF, C
OUT
= 22 µF, L
OUT
= 0.5 µH. Buck1 is configured to
1.8V. Buck2 is configured to 1.0V. Typical values and limits appearing in normal type apply for T
A
= 25°C. Limits appearing in
boldface type apply over the entire junction temperature range for operation, −40°C to +125°C.
(1) (2)
Symbol Parameter Conditions Min Typ Max Units
R
DSON
(P) Pin-Pin Resistance PFET 70 100 mΩ
R
DSON
(N) Pin-Pin Resistance NFET 80 100 mΩ
T
ON
Turn On Time Start up from shut-down 500 µsec
C
IN
Input Capacitor Capacitance for stability 10 µF
C
O
Output Capacitor Capacitance for stability 10 22 µF
I/O Electrical Characteristics
Unless otherwise noted: AVDD=AVIN=VIN1=VIN2 = 3.3V. Typical values and limits appearing in normal type apply for T
J
=
25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, T
J
= -40 to +125°C
(1)
(2)
Symbol Parameter Min Typ Max Units
V
IL
Input Low Level, ENSW1, ENSW2, ENLDO 0.4 V
V
IH
Input High Level, ENSW1, ENSW2, ENLDO 0.8*V
IN
V
I
OH
nPOR 0.01 2 µA
V
OL
nPOR 0.125 0.25 V
T
nPOR
nPOR Delay 60 200 475 msec
(1) All voltages are with respect to the potential at the GND pin.
(2) Min and Max limits are specified by design, test, or statistical analysis. Typical numbers represent the most likely norm.
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