US 9,811,619 B2
Low drop-out voltage regulator modeling systems and methods
Robert Nichols Atwell, Tucson, AZ (US); and Britt Eric Brooks, Allen, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Sep. 13, 2014, as Appl. No. 14/485,721.
Claims priority of provisional application 61/894,234, filed on Oct. 22, 2013.
Prior Publication US 2015/0112502 A1, Apr. 23, 2015
Int. Cl. G06F 17/50 (2006.01); G05F 1/56 (2006.01)
CPC G06F 17/5036 (2013.01) [G06F 17/5063 (2013.01); G05F 1/56 (2013.01); G06F 17/5045 (2013.01); G06F 2217/78 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a computer specialized with blocks of instructions and data structures to transform values of a set of operational parameters from a data sheet associated with a low drop-out voltage regulator (“LDO”) into a computer model of the LDO, the blocks of instructions and data structures to include:
an LDO base model table to store base model values representing a circuit topology and a set of analog behavior blocks associated with a fixed output voltage LDO base model, the set of analog behavioral blocks comprising a lumped analog behavior block (“LABB”) including:
a first input terminal coupled to an input voltage terminal (“IN”) to receive an input voltage (“V_INP”) from an input voltage source,
a second input terminal coupled to an output voltage terminal (“OUT”) to receive a nominal regulated output voltage (“V_OUT”),
a third input terminal coupled to a junction of two feedback resistors to receive a feedback voltage signal (“V_FBK”), V_FBK representing a portion of the nominal regulated output voltage, and
an output terminal to output an intermediate voltage V_INT, the output terminal coupled to a terminal of a parallel resistor-capacitor (“RC”) zero-creating filter including a resistor of resistance R_ZERO and a capacitor of capacitance C_ZERO, an opposite junction of the RC zero-creating filter coupled to the positive input of a voltage-controlled voltage source (“VCVS”);
an LDO parameter input instructions block to accept the parameter values;
an LDO analog behavior characterization instructions block to apply characteristics of the base model to the parameter values to effect the transformation; and
an LDO characterization output instructions block to output the computer model of the LDO.