lm21215a-1 National Semiconductor Corporation, lm21215a-1 Datasheet - Page 3

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

Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Electrical Characteristics
standard type are for T
Minimum and maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most
likely parametric norm at T
PVIN(Note
SW(Note
PGOOD, SS/TRK to GND
Storage Temperature
Soldering Specification for
TSSOP Pb-Free Infrared or
Convection (30 sec)
SYSTEM
OSCILLATOR
ERROR AMPLIFIER
ΔV
ΔV
V
R
V
R
Symbol
t
t
ΔVramp
f
t
t
RESETSS
HSBLANK
OUT
DEFAULT
t
LSBLANK
ZXBLANK
UVLOHYS
TRACKOS
f
t
V
t
OUT
DSON HS
DSON LS
t
SY_MIN
GBW
SYNCR
SY_SW
MINON
INTSS
I
I
V
V
V
I
UVLO
I
CLR
CLF
I
SD
SS
Q
OL
FB
ZX
/ΔI
/ΔV
OUT
3), EN, FB, COMP,
IN
2), AVIN to GND
Parameter
Feedback pin voltage
Load Regulation
Line Regulation
High Side Switch On Resistance
Low Side Switch On Resistance
HS Rising Switch Current Limit
LS Falling Switch Current Limit
Zero Cross Voltage
Operating Quiescent Current
Shutdown Quiescent Current
AVIN Under Voltage Lockout
AVIN Under Voltage Lockout Hysteresis
SS/TRACK PIN accuracy (V
Soft-Start Pin Source Current
Internal Soft-Start Ramp to Vref
Device Reset to Soft-Start Ramp
SYNC Frequency Range
Default (no SYNC signal) Frequency
Time from SYNC falling to V
Minimum SYNC pin pulse width, high or low
HS OCP Blanking Time
LS OCP Blanking Time
Zero Cross Blanking Time
Minimum HS on-time
PWM Ramp p-p Voltage
Error Amplifier Open Loop Voltage Gain
Error Amplifier Gain-Bandwidth Product
J
= 25°C only, limits in bold face type apply over the junction temperature (T
J
= 25°C, and are provided for reference purposes only.
−0.3V to PVIN + 0.3V
SS
SW
−65°C to 150°C
Unless otherwise stated, the following conditions apply: V
- V
Rising
−0.3V to +6V
(Note
FB
)
260°C
1)
3
Conditions
V
I
I
V
AVIN Rising
0 < V
C
Rising edge of SW to I
comparison
Falling edge of SW to I
comparison
Falling edge of SW to V
comparison
ICOMP = -65µA to 1mA
SW
SW
IN
EN
SS
PVIN, AVIN to GND
Junction Temperature
θ
Operating Ratings
= 2.95V to 5.5V
ESD Rating
Human Body Model
= 12A
= 12A
= 0V
= 0
JA
TRACK
(Note
< 0.55V
5)
CLR
CLF
ZX
(Note
4)
17.3
2.45
Min
-1%
140
350
300
475
-10
1.3
50
J
-8
) range of −40°C to +125°C.
(Note
PVIN, AVIN
0.02
2.70
Typ
200
500
110
500
200
100
400
120
140
0.6
0.1
7.0
4.3
1.5
1.9
0.8
20
14
50
55
95
11
1)
3
6
−40°C to +125°C
= 5V. Limits in
+2.95V to +5.5V
1500
Max
22.8
2.95
280
675
200
525
1%
9.0
6.0
3.0
2.5
12
70
20
www.national.com
%V
%V
dBV/V
24°C/W
Units
MHz
mΩ
mΩ
kHz
kHz
mV
mA
mV
mV
µA
µA
µs
µs
ns
ns
ns
ns
ns
ns
V
A
V
A
A
V
V
OUT
OUT
2kV
/
/