LM27402_15 Datasheet, PDF (33/48 Pages) Texas Instruments – LM27402 High-Performance Synchronous Buck Controller With DCR Current Sensing

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LM27402
SNVS615J – JANUARY 2010 – REVISED JULY 2015
Typical Applications (continued)
DESIGNATOR
D_BOOT
D_SW
L_OUT
Q_L
Q_H
R_C1
R_C2
R_FADJ
R_FB1
R_FB2
R_F
R_PGD
R_S
R_SET
Table 1. Bill of Materials (continued)
TYPE
Diode
Diode
Inductor
N-CH MOSFET
N-CH MOSFET
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
Resistor
PARAMETERS
Schottky Diode, Average I = 100 mA, Max Surge I =
750 mA
Schottky Diode, Average I = 3A, Max Surge I = 80A
0.68 µH, 2.34 mΩ
30 V, 60 A, 43.5 nC, R_DS(on) at 4.5 V = 1.85 mΩ
25 V, 40 A, 13 nC, R_DS(on) at 4.5 V = 6.2 mΩ
8.06 kΩ, 1%, 0.1 W
261 Ω, 1%, 0.1 W
45.3 kΩ, 1%, 0.1 W
20.0 kΩ, 1%, 0.1 W
13.3 kΩ, 1%, 0.1 W
2.2 Ω, 5%, 0.1 W
51.1 kΩ, 5%, 0.1 W
1.3 kΩ, 1%, 0.1 W
6.34 kΩ, 1%, 0.1 W
PART NUMBER
CMOSH-3
CMSH3-40M
IHLP5050CEERR68M06
Si7192DP
SiR436DP
CRCW06038k06FKEA
CRCW0603261RFKEA
CRCW060345K3FKEA
CRCW060320K0FKEA
CRCW060320K0FKEA
CRCW06032R20JNEA
CRCW060351K1JNEA
CRCW06031K30FKEA
CRCW06036K34FKEA
QTY
1
1
1
1
1
1
1
1
1
1
1
1
1
1
MANUFACTURER
Central Semi
Central Semi
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
Vishay
8.2.2 Application Curves
100
95
V_IN = 5V
90
V_IN = 12V
85
80
75
70
0
5
10
15
20
OUTPUT CURRENT (A)
Figure 42. Converter Efficiency vs. Output Current
Figure 43. Start-up Characteristic with EN Stepped High,
15-A Electronic Load (2 ms/div)
Figure 44. 10-A to 20-A Load Transient (100 µs/div)
Figure 45. 0-A to 20-A Load Transient (100 µs/div)
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