Datasheet

LMZ12003
www.ti.com SNVS636N –DECEMBER 2009–REVISED OCTOBER 2013
Electrical Characteristics (continued)
Limits in standard type are for T
J
= 25°C only; limits in boldface type apply over the junction temperature (T
J
) range of -40°C
to +125°C. Minimum and Maximum limits are ensured through test, design or statistical correlation. Typical values represent
the most likely parametric norm at T
J
= 25°C, and are provided for reference purposes only. Unless otherwise stated the
following conditions apply: V
IN
= 12V, Vout = 1.8V
(1)
Min Typ Max
Symbol Parameter Conditions Units
(2) (3) (2)
I
FB
Feedback input bias current 5 nA
I
Q
Non Switching Input Current V
FB
= 0.86V 1 mA
I
SD
Shut Down Quiescent Current V
EN
= 0V 25 μA
Thermal Characteristics
T
SD
Thermal Shutdown Rising 165 °C
T
SD-HYST
Thermal shutdown hysteresis Falling 15 °C
θ
JA
(4)
Junction to Ambient 4 layer JEDEC Printed Circuit Board, 19.3 °C/W
100 vias, No air flow
2 layer JEDEC Printed Circuit Board, No 21.5 °C/W
air flow
θ
JC
Junction to Case No air flow 1.9 °C/W
PERFORMANCE PARAMETERS
ΔV
O
Output Voltage Ripple 8 mV
PP
ΔV
O
/ΔV
IN
Line Regulation V
IN
= 8V to 20V, I
O
= 3A .01 %
ΔV
O
/ΔV
IN
Load Regulation V
IN
= 12V 1.5 mV/A
η Efficiency V
IN
= 12V V
O
= 1.8V I
O
= 1A 87 %
η Efficiency V
IN
= 12V V
O
= 1.8V I
O
= 3A 77 %
(4) θ
JA
measured on a 1.705” x 3.0” four layer board, with one ounce copper, thirty five thermal vias, no air flow, and 1W power dissipation.
Refer to PCB layout diagrams.
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