RC5054A 데이터 시트보기 (PDF) - Fairchild Semiconductor

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RC5054A

Programmable Synchronous DC-DC Converter Controller for Low Voltage Microprocessors

Fairchild Semiconductor 

RC5054A

PRODUCT SPECIFICATION

Electrical Specifications (Recommended Operating Conditions unless otherwise specified)

Symbol Parameter

Test Conditions

Min. Typ. Max. Units

VCC Supply Current

ICC

Nominal Supply

UGATE and LGATE Open

– 22 – mA

Power-On Reset

Rising VCC Threshold

VOCSET = 4.5V

–

– 10.4 V

Falling VCC Threshold

VOCSET = 4.5V

8.8 –

–

V

Rising VOCSET Threshold

– 1.26 –

V

Oscillator

Free Running Frequency

RT = OPEN

185 200 215 KHz

∆VOSC Ramp Amplitude

RT = Open

– 1.9 – VP-P

Reference and DAC

Initial Voltage Setpoint

ILOAD = 0.8A, VOUT = 2.000V 1.980 2.000 2.020 V

VOUT = 1.550V 1.534 1.550 1.566 V

Error Amplifier

DC Gain

–

88

–

dB

GBW Gain-Bandwidth Product

– 15 – MHz

SR

Slew Rate

COMP = 10pF

–

6

– V/µs

Gate Drivers

IUGATE Upper Gate Source

VBOOT - VPHASE = 12V

350 500 – mA

IUGATE Upper Gate Sink

VUGATE - VPHASE = 1V

– 100 – mA

ILGATE Lower Gate Source

VCC = 12V, VLGATE = 6V

300 450 – mA

ILGATE Lower Gate Sink

VUGATE - VPHASE = 1V

– 100 – mA

Protection

Over-Voltage Trip (VSEN/DACOUT)

– 115 120 %

IOCSET OCSET Current Source

VOCSET = 4.5VDC

170 200 230 µA

IOVP

ISS

OVP Sourcing Current

Soft Start Current

VSEN = 5.5V, VOVP = 0V

60 –

– mA

–

10

–

µA

Power Good

Upper Threshold (VSEN/DACOUT) VSEN Rising

106 – 111 %

Lower Threshold (VSEN/DACOUT) VSEN Falling

89 – 94 %

Hysteresis (VSEN/DACOUT)

Upper and Lower Threshold

–

2

–

%

VPGOOD PGOOD Voltage Low

IPGOOD = -5mA

– 0.5 –

V

4

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