SC2434SWTRT Datasheet SC2434SWTRT | P16-P18

16 2005 Semtech Corp. www.semtech.com

PRELIMINARYPOWER MANAGEMENT

SC2434

Applications Information (Cont.)

The typical phase node voltage and the output voltage ripple waveform is shown in Fig. 11 under 60A full load

operation, where one can see the output ripple is very small and even with a frequency three times of the switching

frequency.

Fig. 11 - The typical phase node voltage and the output voltage ripple waveform under 60A full load operation.

The typical gate waveform for the top and bottom MOSFETs is also shown here, well-controlled dead time is

demonstrated which ensures high efficiency operation of the VR.

Fig. 12 - The typical gate waveform for the top and bottom MOSFETs.

Ch2: HS Gate

Ch3: Phase Node

Ch4: LS Gate

17 2005 Semtech Corp. www.semtech.com

POWER MANAGEMENT

SC2434

Applications Information (Cont.)

The transient response for a maximum load step changes (10A to 60A) is shown in Fig. 14, where one can see that

accurate drooping will help to reduce the amount of output capacitance needed. Please notice that using more

multilayer ceramic capacitors for better high frequency decoupling can reduce the narrow voltage spikes.

Fig. 13 - Transient response and the test condition:

Step Load from 10A to 60A

Output Capacitors: 14 units of 560uF OSCON caps, 38 units of 10uF ceramic caps

Ch1: Output Voltage

Ch4: Output Current (1A = 27.5mV di/dt = 370A/uS)

Meet Intel P-4 spec

Output Voltage

Load Current

18 2005 Semtech Corp. www.semtech.com

PRELIMINARYPOWER MANAGEMENT

SC2434

(L1)

GAGE

PLANE

SEE DETAIL

DETAIL

0.25

.026 BSC

.252 BSC

.004

.169

.251

.173

.255

.007

0.10

0.65 BSC

6.40 BSC

4.40

6.50

.177

.259

4.30

6.40

.012 0.19

4.50

6.60

0.30

bxN

2X N/2 TIPS

SEATING

aaa C

E/2

INDICATOR

PIN 1

1 32

bbb C A-B D

ccc

DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS3.

OR GATE BURRS.

DATUMS AND TO BE DETERMINED AT DATUM PLANE

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

-B-

NOTES:

2. -A-

-H-

SIDE VIEW

(.039)

.004

.008

.024

0°

.018

.003

.031

.002

8° 0°

0.20

0.10

8°

0.45

0.09

0.80

0.05

.030

.007

.047

.042

.006

(1.0)

0.60

0.75

0.20

1.20

1.05

0.15

e/2

PLANE

REFERENCE JEDEC STD MO-153, VARIATION AC.

INCHES

ccc

aaa

bbb

DIM

MIN MAX

MILLIMETERS

MIN

DIMENSIONS

NOM MAX NOM

Outline Drawing - TSSOP-20

Land Pattern - TSSOP-20

(.222) (5.65)

(C)

4.10.161

0.65.026

0.40.016

1.55.061

7.20.283

INCHES

DIMENSIONS

DIM

MILLIMETERS

THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.

CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR

COMPANY'S MANUFACTURING GUIDELINES ARE MET.

NOTES:

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P19

SC2434SWTRT

Mfr. #:

Buy SC2434SWTRT

Manufacturer:

Semtech

Description:

Switching Controllers TR PHSE CRENT MODE CNTLR PWRGD

Lifecycle:

New from this manufacturer.

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SC2434SWTRT