lm21215a-1 National Semiconductor Corporation, lm21215a-1 Datasheet - Page 5

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

Typical Performance Characteristics
(1.8mΩ R
others.
(VOUT = 2.5 V, f
DCR
-0.02
-0.04
-0.06
-0.08
-0.10
0.10
0.08
0.06
0.04
0.02
0.00
100
100
), C
98
96
94
92
90
88
86
84
82
80
98
96
94
92
90
3.0
SW
SS
0
0
= 500 kHz , Inductor P/N SER2010-601MLD)
= 33nF, f
FSW = 500 kHz
FSW = 750 kHz
FSW = 1 MHz
IOUT = 0A
IOUT = 12A
3.5
Line Regulation
OUTPUT CURRENT (A)
OUTPUT CURRENT (A)
3
3
INPUT VOLTAGE (V)
Efficiency
Efficiency
SW
4.0
6
6
= 500 kHz, T
4.5
VIN = 3.3V
VIN = 4.0V
VIN = 5.0V
VIN = 5.5V
9
9
A
5.0
12
12
= 25°C for efficiency curves, loop gain plots and waveforms, and T
5.5
15
15
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Unless otherwise specified: V
-0.01
-0.02
-0.03
-0.04
0.04
0.03
0.02
0.01
0.00
100
1.5
1.4
1.3
1.2
1.1
1.0
98
96
94
92
90
88
86
84
82
80
3.0
Non-Switching I
0
0
VOUT = 1.2V
VOUT = 3.3V
VIN = 3.3V
VIN = 5.0V
Load Regulation
OUTPUT CURRENT (A)
3.5
3
3
OUTPUT CURRENT (A)
INPUT VOLTAGE (V)
Efficiency
VIN
4.0
6
6
= 5V, V
QTOTAL
9
4.5
9
OUT
vs. V
= 1.2V, L= 0.56µH
12
12
IN
5.0
J
= 25°C for all
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15
15
5.5
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