lm21215a-1 National Semiconductor Corporation, lm21215a-1 Datasheet - Page 4

• Manufacturer Part Number: lm21215a-1
• Description: 15a High Efficiency Synchronous Buck Regulator With Frequency Synchronization
• Manufacturer: National Semiconductor Corporation

www.national.com
Note 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 guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The PVIN pin can tolerate transient voltages up to 6.5 V for a period of up to 6ns. These transients can occur during the normal operation of the device.
Note 3: The SW pin can tolerate transient voltages up to 9.0 V for a period of up to 6ns, and -1.0V for a duration of 4ns. These transients can occur during the
normal operation of the device.
Note 4: The human body model is a 100 pF capacitor discharged through a 1.5 kΩ resistor to each pin.
Note 5: Thermal measurements were performed on a 2x2 inch, 4 layer, 2 oz. copper outer layer, 1 oz.copper inner layer board with twelve 8 mil. vias underneath
the EP of the device and an additional sixteen 8 mil. vias under the unexposed package.
SYSTEM
POWERGOOD
LOGIC
THERMAL SHUTDOWN
T
I
THERMSDHYS
PGOODLEAK
T
I
I
Symbol
V
V
COMPSINK
COMPSRC
R
V
V
V
t
THERMSD
t
V
PGDGH
OVPHYS
UVPHYS
PGDGL
V
V
PGOOD
IHSYNC
ILSYNC
ENHYS
IHENR
I
I
OVP
UVP
EN
FB
Parameter
Feedback Pin Bias Current
COMP Output Source Current
COMP Output Sink Current
Over Voltage Protection Rising Threshold
Over Voltage Protection Hysteresis
Under Voltage Protection Rising Threshold
Under Voltage Protection Hysteresis
PGOOD Deglitch Low (OVP/UVP Condition
Duration to PGOOD Falling)
PGOOD Deglitch High (minimum low pulse)
PGOOD Pull-down Resistance
PGOOD Leakage Current
SYNC Pin Logic High
SYNC Pin Logic Low
EN Pin Rising Threshold
EN Pin Hysteresis
EN Pin Pullup Current
Thermal Shutdown
Thermal Shutdown Hysteresis
4
Conditions
V
V
V
V
V
V
V
V
FB
FB
FB
FB
FB
PGOOD
EN
EN
= 0.6V
Rising
Falling
Rising
Falling
Rising
= 0V
= 5V
1.20
Min
105
2.0
82
10
50
112.5
1.35
Typ
110
165
2.5
65
90
15
12
20
10
1
1
2
1
2
Max
1.45
120
180
0.8
97
40
Units
%V
%V
%V
%V
mA
mV
nA
µA
nA
µA
°C
°C
µs
µs
Ω
V
V
V
FB
FB
FB
FB