Datasheet ADP2127 (Analog Devices) - 3

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Data Sheet ADP2126/ADP2127 SPECIFICATIONS
VIN = 3.6 V, TA = 25°C for typical specifications, and TA = TJ = −40°C to +85°C for minimum and maximum specifications, unless otherwise noted. All specifications at temperature extremes are guaranteed via correlation using the standard statistical quality control (SQC) methods. Typical specifications are not guaranteed.
Table 1. Parameter Symbol Test Conditions/Comments Min Typ Max Unit
SUPPLY Operating Input Voltage Range VIN 2.1 5.5 V PWM Mode Quiescent Current No load, VMODE = VIN 12 mA Auto Mode Quiescent Current No load, VMODE = 0 V, VFB > VOUT, SW = open 300 500 μA Shutdown Current1 VEXTCLK = 0 V, open loop 0.3 1.5 μA UNDERVOLTAGE LOCKOUT Rising VIN Threshold 1.9 2.1 V Falling VIN Threshold 1.5 1.8 V OUTPUT Continuous Output Current2 ILOAD VIN = 2.1 V to 5.5 V 500 mA PWM Mode Output Accuracy3 VOUT VIN = 2.1 V to 5.5 V, no load VOUT − 2% VOUT + 2% V PFM Mode Output Accuracy3, 4 VIN = 2.1 V to 5.5 V VOUT − 3% VOUT + 3% V FB Bias Current VFB = VOUT 4 9 μA FB Pull-Down Resistance RDSCHG VEXTCLK = 0 V, IFB = 10 mA 110 180 Ω SWITCHING CHARACTERISTICS PMOS On Resistance ISW = 500 mA 180 340 mΩ NMOS On Resistance ISW = 500 mA 250 mΩ SW Leakage Current VSW = 0 V, VIN = 5.5 V 10 μA PMOS Switch Current Limit Open loop 770 1000 1291 mA PFM Current Limit VMODE = 0 V, VIN = 3.6 V 170 260 305 mA Oscillator Frequency fSW 4.8 6 6.8 MHz SHORT-CIRCUIT PROTECTION Rising VOUT Threshold 0.55 0.7 V Falling VOUT Threshold 0.4 0.52 V EXTCLK INPUT High Threshold Voltage VEXTCLK(H) VIN = 2.1 V to 5.5 V 1.3 V Low Threshold Voltage VEXTCLK(L) VIN = 2. 1 V to 5.5 V 0.4 V Leakage Current VIN = 5.5 V, VEXTCLK = 2.1 V to 5.5 V 0.01 1 μA Duty Cycle Operating Range DEXTCLK 40 60 % Frequency Operating Range fEXTCLK 6 27 MHz MODE INPUT LOGIC High Threshold Voltage VMODE(H) VIN = 2.1 V to 5.5 V 1.3 V Low Threshold Voltage VMODE(L) VIN = 2.1 V to 5.5 V 0.4 V Leakage Current VEXTCLK = 0 V, VIN = VMODE = 5.5 V 0.005 1 μA THERMAL SHUTDOWN5 PWM mode only Thermal Shutdown Threshold 146 °C Thermal Shutdown Hysteresis 13 °C Rev. B | Page 3 of 20 Document Outline FEATURES APPLICATIONS TYPICAL APPLICATIONS CIRCUIT GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS TIMING DIAGRAMS ABSOLUTE MAXIMUM RATINGS THERMAL CONSIDERATIONS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW EXTERNAL CLOCK (EXTCLK) ENABLE SPREAD SPECTRUM OSCILLATOR MODE SELECTION Pulse-Width Modulation (PWM) Mode Auto Mode (PFM and PWM Switching) Pulse Frequency Modulation (PFM) Mode Mode Transition INTERNAL CONTROL FEATURES Synchronous Rectification Soft Start PROTECTION FEATURES Overcurrent Protection Output Short-Circuit Protection (SCP) Thermal Shutdown (TSD) Protection Undervoltage Lockout (UVLO) TIMING CONSTRAINTS Shutdown Time Power-Off Time APPLICATIONS INFORMATION INDUCTOR SELECTION INPUT CAPACITOR SELECTION OUTPUT CAPACITOR SELECTION THERMAL CONSIDERATIONS PCB LAYOUT GUIDELINES OUTLINE DIMENSIONS ORDERING GUIDE