Datasheet
LMZ12001
SNVS651G –JANUARY 2010–REVISED OCTOBER 2013
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Absolute Maximum Ratings
(1)(2)
VIN, RON to GND -0.3V to 25V
EN, FB, SS to GND -0.3V to 7V
Junction Temperature 150°C
Storage Temperature Range -65°C to 150°C
ESD Susceptibility
(3)
± 2 kV
Peak Reflow Case Temperature 245°C
(30 sec)
For soldering specifications, refer to the following document: www.ti.com/lit/snoa549c
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and
specifications.
(3) The human body model is a 100pF capacitor discharged through a 1.5 kΩ resistor into each pin. Test method is per JESD-22-114.
Operating Ratings
(1)
V
IN
4.5V to 20V
EN 0V to 6.5V
Operation Junction Temperature −40°C to 125°C
(1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which
operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.
Electrical Characteristics
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 specified 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)
SYSTEM PARAMETERS
Enable Control
V
EN
EN threshold trip point V
EN
rising 1.10 1.18 1.25 V
V
EN-HYS
EN threshold hysteresis V
EN
falling 90 mV
Soft-Start
I
SS
SS source current V
SS
= 0V 5 8 11 µA
I
SS-DIS
SS discharge current -200 µA
Current Limit
I
CL
Current limit threshold d.c. average 1.4 2.0 3.0 A
ON/OFF Timer
t
ON-MIN
ON timer minimum pulse width 150 ns
t
OFF
OFF timer pulse width 260 ns
Regulation and Over-Voltage Comparator
V
FB
In-regulation feedback voltage V
SS
>+ 0.8V 0.777 0.798 0.818 V
T
J
= -40°C to 125°C
I
O
= 1A
V
SS
>+ 0.8V 0.786 0.802 0.818
T
J
= 25°C
I
O
= 10 mA
V
FB-OV
Feedback over-voltage protection 0.92 V
threshold
I
FB
Feedback input bias current 5 nA
(1) EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See AN-2024 and layout for information on device under test.
(2) Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are specified through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(3) Typical numbers are at 25°C and represent the most likely parametric norm.
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