RC5051 View Datasheet(PDF) - Fairchild Semiconductor

Part Name

Description

Manufacturer

RC5051

Programmable Synchronous DC-DC Controller for Low Voltage Microprocessors

Fairchild Semiconductor 

PRODUCT SPECIFICATION

RC5051

Absolute Maximum Ratings

Supply Voltages, VCCA, VCCP, VCCQP to GND

Supply Voltage VCCQP, Charge Pump (VIN+VCCA)

Voltage Identification Code Inputs, VID4-VID0

Junction Temperature, TJ

Storage Temperature

Lead Soldering Temperature, 10 seconds

13V

18V

13V

150°C

-65 to 150°C

300°C

Operating Conditions

Parameter

Supply Voltage, VCCA, VCCP

Input Logic HIGH

Input Logic LOW

Ambient Operating Temp

Output Driver Supply, VCCQP

PWRGD threshold

Conditions

Logic High

Logic Low

Min.

4.75

2.0

0

8.5

93

88

Typ.

5

Max.

5.25

0.8

70

12

107

112

Units

V

V

V

°C

V

%VOUT

%VOUT

Electrical Specifications

(VCCA = 5V, VOUT = 2.8V, fosc = 300 KHz, and TA = +25°C using circuit in Figure 1, unless otherwise noted)

The • denotes specifications which apply over the full operating temperature range.

Parameter

Conditions

Min. Typ. Max. Units

Output Voltage

Output Current

Initial Voltage Setpoint

Output Temperature Drift

Load Regulation

Line Regulation

Output Ripple

Total Output Variation

Steady State1

Total Output Variation

Transient2

See Table 1

ILOAD = 0.8A, VOUT = 2.8V

VOUT = 2.0V

TA = 0 to 70°C VOUT = 2.8V

VOUT = 2.0V

ILOAD = 0.8A to 14.2A

VIN = 4.75V to 5.25V

20MHz BW, ILOAD = 14.2A

VOUT = 2.8V

VOUT = 2.0V

ILOAD = 0.8 to 14.2A, VOUT = 2.8V

VOUT = 2.0V

• 1.3

3.5

V

15

A

2.797 2.825 2.853 V

2.000 2.020 2.040 V

•

+16

mV

•

+11

mV

•

-20

mV

•

±2

mV

±13

mVpk

• 2.740

• 1.940

2.900 V

2.060 V

• 2.670

• 1.900

2.930 V

2.100 V

Short Circuit Detect Threshold

Efficiency

Output Driver Rise and Fall Time

Output Driver Deadtime 1

Output Driver Deadtime 2

Turn-on Response Time

Oscillator Range

Oscillator Frequency

Max Duty Cycle

ILOAD = 14.2A, VOUT = 2.8V

See Figure 2

See Figure 2

See Figure 2

ILOAD = 0A to 14.2A

CEXT = 100 pF

• 100

•

80

270

90

120 140 mV

82

%

80

nsec

5

%/fOSC

80

nsec

10 msec

1000 KHz

300 330 KHz

95

%

Notes:

1. Steady Date Voltage Regulation includes Initial Voltage Setpoint, Load Regulation, Output Ripple and Output Temperature Drift

and is measured at the converter’s output capacitors.

2. As measured at the converter’s output capacitors. For motherboard applications, the PCB layout should exhibit no more than

0.5mΩ trace resistance between the converter’s output capacitors and the CPU.

REV. 1.0.4 4/2/01

3

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