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2 V/div

2 V/div

12.5 ns/div

Q1 Gate

Q1 Drain

2 V/div

2 V/div

12.5 ns/div

Q1 Drain

Q1 Gate

TPS2816-EP, TPS2817-EP, TPS2818-EP

TPS2819-EP, TPS2828-EP, TPS2829-EP

SGDS039 – FEBRUARY 2008

Table 1. Bill of Materials

REF DES

PART NO.

DESCRIPTION

MFR

U1

TPS2817DBV

IC, MOSFET driver, single noninverting

TI

U2

TL5001CD

IC, PWM controller

TI

Q1

TPS1110D

MOSFET, p-channel, 6 A, 7 V, 75 m

Ω

TI

C1, C2, C5, C8

Capacitor, ceramic, 0.1

µF, 50 V, X7R, 1206

C3

Capacitor, ceramic, 0.033

µF, 50 V, X7R, 1206

C4

Capacitor, ceramic, 2200 pF, 50 V, X7R, 0805

C6

ECS-T1CY105R

Capacitor, tantalum, 1.0

µF, 16 V, A case

Panasonic

C7

10SC47M

Capacitor, OS-Con, 47

µF, 10 V

Sanyo

C9

Capacitor, ceramic, 1000 pF, 50 V, X7R, 0805

C10, C12

10SA220M

Capacitor, OS-Con, 220

µF, 10 V

Sanyo

C11

Capacitor, ceramic, 0.022

µF, 50 V, X7R, 0805

C13

Capacitor, ceramic, 47

µF, 50 V, X7R

CR1

50WQ03F

Diode, Schottky, D-pak, 5 A 30 V

IR

L1

SML3723

Inductor, 27

µH, ±20%, 3 A

Nova Magnetics

R1

Resistor, CF, 47 k

Ω, 1/10 W, 5%, 0805

R2

Resistor, CF, 1.5 k

Ω, 1/10 W, 5%, 0805

R3

Resistor, MF, 30.1 k

Ω, 1/10 W, 1%, 0805

R4

Resistor, MF, 1.00 k

Ω, 1/10 W, 1%, 0805

R5

Resistor, CF, 47

Ω, 1/10 W, 5%, 0805

R6 (3.3-V)

Resistor, MF, 2.32 k

Ω, 1/10 W, 1%, 0805

R6 (2.5-V)

Resistor, MF, 1.50 k

Ω, 1/10 W, 1%, 0805

R7

Resistor, CF, 100

Ω, 1/10 W, 5%, 0805

As shown in Figure 24 and Figure 25, the TPS2817 turns on the TPS1110 power switch in less than 20 ns and

off in 25 ns.

Figure 24. Q1 Turn-On Waveform

Figure 25. Q1 Turn-Off Waveform

18

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Product Folder Link(s): TPS2816-EP TPS2817-EP TPS2818-EP TPS2819-EP TPS2828-EP TPS2829-EP