Datasheet

LM20333
www.ti.com SNVS558D –MAY 2008–REVISED APRIL 2013
Absolute Maximum Ratings
(1)(2)
VIN to GND -0.3V to +38V
BOOT to GND -0.3V to +43V
BOOT to SW -0.3V to +7V
SW to GND -0.5V to +38V
SW to GND (Transient) -1.5V (< 20 ns)
FB, EN, SS/TRK, COMP, SYNC, PGOOD to GND -0.3V to +6V
VCC to GND -0.3V to +8V
Storage Temperature -65°C to 150°C
ESD Rating
Human Body Model
(3)
2kV
(1) Absolute Maximum Ratings indicate limits beyond witch damage to the device may occur. Operating Ratings indicate conditions for
which the device is intended to be functional, but do not ensure specific performance limits. For ensured 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 100 pF capacitor discharged through a 1.5 kΩ resistor to each pin.
Operating Ratings
VIN to GND +4.5V to +36V
Junction Temperature −40°C to + 125°C
Electrical Characteristics
Unless otherwise stated, the following conditions apply: V
VIN
= 12V. Limits in standard type are for T
J
= 25°C only, limits in
bold face 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.
Symbol Parameter Conditions Min Typ Max Units
V
FB
Feedback Pin Voltage V
VIN
= 4.5V to 36V 0.788 0.8 0.812 V
R
HSW-DS(ON)
High-Side MOSFET On-Resistance I
SW
= 3A 130 225 mΩ
R
LSW-DS(ON)
Low-Side MOSFET On-Resistance I
SW
= 3A 110 190 mΩ
I
Q
Operating Quiescent Current V
VIN
= 4.5V to 36V 2.3 3 mA
I
SD
Shutdown Quiescent Current V
EN
= 0V 150 180 µA
V
UVLO
VIN Under Voltage Lockout Rising V
VIN
4 4.25 4.5 V
V
UVLO(HYS)
VIN Under Voltage Lockout Hysteresis 350 450 mV
V
VCC
VCC Voltage I
VCC
= -5 mA, V
EN
= 5V 5.5 V
I
SS
Soft-Start Pin Source Current V
SS
= 0V 2 4.5 7 µA
V
TRKACC
Soft-Start/Track Pin Accuracy V
SS
= 0.4V -10 5 15 mV
I
BOOT
BOOT Diode Leakage V
BOOT
= 4V 10 nA
V
F-BOOT
BOOT Diode Forward Voltage I
BOOT
= -100 mA 0.9 1.1 V
Powergood
V
FB(OVP)
Over Voltage Protection Rising Threshold V
FB(OVP)
/ V
FB
107 110 112 %
V
FB(OVP-HYS)
Over Voltage Protection Hysteresis Δ
VFB(OVP)
/ V
FB
2 3 %
V
FB(PG)
PGOOD Threshold, V
OUT
Rising V
FB(PG)
/ V
FB
93 95 97 %
V
FB(PG-HYS)
PGOOD Hysteresis ΔV
FB(PG)
/ V
FB
2 3 %
T
PGOOD
PGOOD Delay 20 µs
I
PGOOD(SNK)
PGOOD Low Sink Current V
PGOOD
= 0.5V 0.6 1 mA
I
PGOOD(SRC)
PGOOD High Leakage Current V
PGOOD
= 5V 5 200 nA
Oscillator
F
OSC
Oscillator Frequency V
SYNC
= 0V 160 200 240 kHz
F
OSCH
Maximum SYNC Frequency 1500 kHz
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