MAX1792 500mA Low-Dropout Linear Regulator in MAX General Description Features The MAX1792 low-dropout linear regulator operates Guaranteed 500mA Output Current from a +2.5V to +5.5V supply and delivers a guaran- Low 130mV Dropout at 500mA teed 500mA load current with low 130mV dropout. The Up to 1% Output Voltage Accuracy high-accuracy (1%) output voltage is preset at an internally trimmed voltage (see Selector Guide) or can Preset at 1.5V, 1.8V, 2.5V, 3.3V, or 5.0V be adjusted from 1.25V to 5.0V with an external resis- Adjustable from 1.25V to 5.0V tive divider. Reset Output with 4ms Timeout Period An internal PMOS pass transistor allows the low 80A Low 80A Ground Current supply current to remain independent of load, making this device ideal for portable battery-operated equip- 0.1A Shutdown Current ment such as personal digital assistants (PDAs), cellu- Thermal Overload Protection lar phones, cordless phones, base stations, and Output Current Limit notebook computers. Tiny 1.3W Power-MAX Package Other features include an active-low open-drain reset output with a 4ms timeout period that indicates when Ordering Information the output is out of regulation, a 0.1A shutdown mode, short-circuit protection, and thermal shutdown protec- PART* TEMP RANGE PIN-PACKAGE tion. The device is available in a miniature 1.3W, 8-pin MAX1792EUA + -40C to +85C 8 Power-MAX power-MAX package with a metal pad on the under- MAX1792EUA /V+ -40C to +85C 8 Power-MAX side of the package. *Insert the desired two-digit suffix (see Selector Guide) into the Applications blanks to complete the part number. +Denotes a lead(Pb)-free/RoHS-compliant package. Notebook Computers /V denotes an automotive qualified part. Cellular and Cordless Telephones Contact factory for other preset output voltages. Personal Digital Assistants (PDAs) Selector Guide Palmtop Computers PART AND SUFFIX V MAX TOP MARK Base Stations OUT MAX1792EUA15+ 1.5V or Adj. AAAE USB Hubs MAX1792EUA18+ 1.8V or Adj. AAAA Docking Stations MAX1792EUA25+ 2.5V or Adj. AAAB MAX1792EUA33+ 3.3V or Adj. AAAC MAX1792EUA50+ 5.0V or Adj. AAAD Typical Operating Circuit MAX1792EUA33/V+ 3.3V or Adj. AACP Pin Configuration V = +2.5V TO +5.5V IN IN V OUT OUT NC C C IN OUT TOP VIEW IN OUT 1F 3.3F + IN 1 8 OUT MAX1792 R RST 100k IN 2 7 OUT ON MAX1792 TO SHDN RST C OFF RST 3 6 SET SHDN 4 5 GND EP SET GND POWER-MAX For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-1699 Rev 2 11/11MAX1792 500mA Low-Dropout Linear Regulator in MAX ABSOLUTE MAXIMUM RATINGS IN, SHDN, RST, SET to GND....................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C OUT to GND ................................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C IN Output Short-Circuit Duration ........................................Indefinite Storage Temperature Range .............................-65C to +150C Continuous Power Dissipation (T = +70C) Lead Temperature (soldering, 10s) .................................+300C A Soldering Temperature (reflow) .......................................+260C 8-Pin Power-MAX (derate 17mW/C above +70C).......1.3W Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = V + 500mV, or V = +2.5V (whichever is greater), SHDN = IN, T = 0C to +85C, unless otherwise noted. Typical IN OUT(NOM) IN A values are at T = +25C.) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage V 2.5 5.5 V IN Input Undervoltage Lockout V Rising, 75mV hysteresis 2.0 2.15 2.3 V UVLO Preset V 2.5V -1 +1 I = 100mA, OUT OUT % T = +85C A Preset V < 2.5V -1.5 +1.5 OUT Output Voltage Accuracy V OUT I = 100mA, T = 0C to +85C -2 +2 OUT A (Preset Mode) % I = 1mA to 500mA, V > V OUT IN OUT + 0.5V, -3 +3 T A = 0C to +85C Adjustable Output Voltage 1.25 5 V Range V = +2.7V, IN T = +85C 1.229 1.250 1.271 A SET Voltage Threshold V V set to 2.0V, V SET OUT (Adjustable Mode) T = 0C to +85C 1.219 1.281 A I = 100mA OUT Maximum Output Current I V 2.7V 500 mA OUT IN RMS Short-Circuit Current Limit I V = 0V, V 2.7V 0.55 0.8 1.8 A LIM OUT IN In-Regulation Current Limit V > 96% of nominal value, V 2.7V 1.6 A OUT IN SET Dual Mode Threshold 50 100 150 mV SET Input Bias Current I V = 1.25V -100 +100 nA SET SET I = 1mA 80 250 OUT Ground-Pin Current I A Q I = 500mA 110 OUT V = 5.0V 120 225 OUT V - IN Dropout Voltage (Note 1) I = 500mA mV OUT V = 3.3V 130 250 OUT V OUT V = 2.5V 210 360 OUT V from (V + 100mV) to 5.5V, IN OUT Line Regulation V -0.15 0 +0.15 %/V LNR I = 5mA LOAD Load Regulation V I = 1mA to 500mA 0.4 1.0 % LDR OUT Output Voltage Noise 10Hz to 1MHz, C 115 V OUT = 3.3F (ESR < 0.1 ) RMS SHUTDOWN Shutdown Supply Current I SHDN = GND, V = 5.5V 0.1 15 A OFF IN V 2.5V < V < 5.5V 1.6 IH IN SHDN Input Threshold V V 2.5V < V < 5.5V 0.6 IL IN SHDN Input Bias Current SHDN = IN or GND 10 100 nA Dual Mode is a trademark of Maxim Integrated Products. 2 Maxim Integrated