Datasheet ADP5054 (Analog Devices) - 6

ADP5054 Data Sheet BUCK REGULATOR SPECIFICATIONS
VIN = 12 V, VVREG = 5.0 V, fSW = 600 kHz for all channels, TJ = −40°C to +125°C for minimum and maximum specifications, and TA = 25°C for typical specifications, unless otherwise noted.
Table 3. Parameter Symbol Min Typ Max Unit Test Conditions/Comments
CHANNEL 1 SYNC BUCK REGULATOR FB1 Pin Adjustable Feedback Voltage VFB1 0.800 V Feedback Voltage Accuracy VFB1(DEFAULT) −0.55 +0.55 % TJ = 25°C −1.25 +1.0 % 0°C ≤ TJ ≤ 85°C −1.5 +1.5 % −40°C ≤ TJ ≤ +125°C Feedback Bias Current IFB1 0.1 μA Adjustable voltage SW1 Pin High-Side Power FET On Resistance RDS(ON)_1H 50 mΩ Pin-to-pin measurement Current-Limit Threshold ITH(ILIM1) 5.2 6.9 8.6 A RILIM1 floating 2.6 3.8 5.0 A RILIM1 = 47 kΩ 7.8 10.4 12.4 A RILIM1 = 22 kΩ Minimum On Time tMIN_ON1 115 150 ns fSW = 250 kHz to 2.0 MHz Minimum Off Time tMIN_OFF1 1/9 × tSW ns fSW = 250 kHz to 2.0 MHz Low-Side Driver, DL1 Pin Rising Time tRISING1 20 ns CISS = 1.2 nF Falling Time tFALLING1 3.4 ns CISS = 1.2 nF Sourcing Resistor tSOURCING1 8 Ω Sinking Resistor tSINKING1 1.2 Ω Error Amplifier (EA), COMP1 Pin EA Transconductance gm1 310 465 620 μS Soft Start Soft Start Time tSS1 2.0 ms CFG12 connected to ground Programmable Soft Start Range 2.0 16.0 ms Hiccup Time tHICCUP1 7 × tSS1 ms COUT Discharge Switch On Resistance RDIS1 250 Ω CHANNEL 2 SYNC BUCK REGULATOR FB2 Pin Adjustable Feedback Voltage VFB2 0.800 V Feedback Voltage Accuracy VFB2(DEFAULT) −0.55 +0.55 % TJ = 25°C −1.25 +1.0 % 0°C ≤ TJ ≤ +85°C −1.5 +1.5 % −40°C ≤ TJ ≤ +125°C Feedback Bias Current IFB2 0.1 μA Adjustable voltage SW2 Pin High-Side Power FET On Resistance RDS(ON)_2H 50 mΩ Pin-to-pin measurement Current-Limit Threshold ITH(ILIM2) 5.2 6.9 8.6 A RILIM2 = floating 2.6 3.8 5.0 A RILIM2 = 47 kΩ 7.8 10.4 12.4 A RILIM2 = 22 kΩ Minimum On Time tMIN_ON2 115 150 ns fSW = 250 kHz to 2.0 MHz Minimum Off Time tMIN_OFF2 1/9 × tSW ns fSW = 250 kHz to 2.0 MHz Low-Side Driver, DL2 Pin Rising Time tRISING2 20 ns CISS = 1.2 nF Falling Time tFALLING2 3.4 ns CISS = 1.2 nF Sourcing Resistor tSOURCING2 8 Ω Sinking Resistor tSINKING2 1.2 Ω Error Amplifier (EA), COMP2 Pin EA Transconductance gm2 310 465 620 μS Rev. G | Page 6 of 31 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY DETAILED FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS BUCK REGULATOR SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION BUCK REGULATOR OPERATIONAL MODES PWM Mode PSM Mode Forced PWM and Automatic PWM/PSM Modes ADJUSTABLE AND FIXED OUTPUT VOLTAGE INTERNAL REGULATORS (VREG AND VDD) SEPARATE SUPPLY APPLICATIONS LOW-SIDE DEVICE SELECTION BOOTSTRAP CIRCUITRY ACTIVE OUTPUT DISCHARGE SWITCH PRECISION ENABLING OSCILLATOR Phase Shift SYNCHRONIZATION INPUT/OUTPUT SOFT START PARALLEL OPERATION STARTUP WITH PRECHARGED OUTPUT CURRENT-LIMIT PROTECTION FREQUENCY FOLDBACK PULSE SKIP IN MAXIMUM DUTY SHORT-CIRCUIT PROTECTION (SCP) LATCH-OFF PROTECTION Short-Circuit Latch-Off Mode UNDERVOLTAGE LOCKOUT (UVLO) POWER-GOOD FUNCTION THERMAL SHUTDOWN APPLICATIONS INFORMATION ADIsimPOWER DESIGN TOOL PROGRAMMING THE OUTPUT VOLTAGE VOLTAGE CONVERSION LIMITATIONS CURRENT-LIMIT SETTING SOFT START SETTING INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION INPUT CAPACITOR SELECTION LOW-SIDE POWER DEVICE SELECTION PROGRAMMING THE UVLO INPUT COMPENSATION COMPONENTS DESIGN POWER DISSIPATION Buck Regulator Power Dissipation Power Switch Conduction Loss (PCOND) Switching Loss (PSW) Transition Loss (PTRAN) Thermal Shutdown JUNCTION TEMPERATURE DESIGN EXAMPLES SETTING THE SWITCHING FREQUENCY SETTING THE OUTPUT VOLTAGE SETTING THE CURRENT LIMIT SELECTING THE INDUCTOR SELECTING THE OUTPUT CAPACITOR SELECTING THE LOW-SIDE MOSFET DESIGNING THE COMPENSATION NETWORK SELECTING THE SOFT START TIME SELECTING THE INPUT CAPACITOR PRINTED CIRCUIT BOARD LAYOUT RECOMMENDATIONS TYPICAL APPLICATION CIRCUIT FACTORY DEFAULT OPTIONS OUTLINE DIMENSIONS ORDERING GUIDE