Datasheet

LM26484
www.ti.com SNVS573F –SEPTEMBER 2008–REVISED MARCH 2013
General Electrical Characteristics
(1)
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, −40°C to +125°C.
(2) (3)
Symbol Parameter Conditions Min Typ Max Units
V
IN
Operational Voltage Range AVDD, AVIN 3.0 3.3 5.5 V
T
SD
Thermal Shutdown
(4)
160 °C
C
IN
Input Capacitor C9 (Typ App Circuit) 10 µF
I
q
Quiescent Current “Off” VIN = 3.3V,
0.03 1 µA
ENSW1, ENSW2, ENLDO = 0
(1) Specified by design.Not productoin tested.
(2) All voltages are with respect to the potential at the GND pin.
(3) Min and Max limits are specified by design, test, or statistical analysis. Typical numbers represent the most likely norm.
(4) Internal thermal shutdown circuitry protects the device from permanent damage. Thermal shutdown engages at T
J
= 160°C (typ.) and
disengages at T
J
= 130°C (typ.)
LDO Controller
Unless otherwise noted, AVDD = AVIN 3.3V, PVIN = 1.8V. 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
V
IN
Operational Voltage Range AVIN LDO internal circuits 3.0 3.3 5.5 V
V
OUT
NMOS configuration Externally configured 0.8 1.5 V
V
FB
Feedback Voltage Accuracy 0.5 V
−1.5 1.5
%
−2 2
PSRR Power Supply Ripple Rejection F = 10 kHz, Load Current = I
MAX
−30 dB
T
ON
Turn On Time Start up from shut-down 500 µsec
C
FB
Feedback Capacitor C11 (Typ. App. Circuit) 12 pF
Output Capacitor Capacitance for stability: µF
10 22
C10,
(3)
−40°C ≤ T
J
≤ 125°C
C
OUT
ESR (Equivalent Series
0.5 Ω
Resistance)
(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.
(3) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under
which operation of the device is specified. Operating Ratings do not imply ensured performance limits. For specified performance limits
and associated test conditions, see the Electrical Characteristics tables.
Buck Converters SW1, SW2
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
V
IN
VIN Range AVDD=VIN1=VIN2 3.0 3.3 5.5 V
V
FB
Feedback Voltage Accuracy 0.5
−1.0 +1.0 %
−1.5 +1.5
DC Line Regulation 3.0 < V
IN
< 3.6 0.174 %/V
I
O
=1000 mA
ΔV
OUT
DC Load Regulation 100 mA < I
O
< I
MAX
0.75 %/A
f
OSC
Oscillator Frequency 1.8 2.0 MHz
I
PEAK
Peak Switching Current Limit 3.2 A
(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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