AN8011S-E1V Panasonic

Voltage Regulators AN8011S 2-channel step-down, step-up, or inverting use DC-DC converter control IC Unit: mm Overview 10.10.3 16 9 The AN8011S is a DC-DC converter control IC with two-channel output using the PWM method which allows 500 kHz high-speed control. Respective output operation can be completely synchronized with each other by using the same 0.3 oscillation output. 18 Features PWM control frequency of 500 kHz is available. Wide operating supply voltage range 1.27 0.4 0.400.25 (V = 3.6 V to 34 V) CC Seating plane Seating plane Built-in 2-channel of open collector type for out- put (A single-channel is also usable for inverted SOP016-P-0225A amplification type) Each output can be stopped independently by the Note) The package of this product will be changed to lead-free type external control . (SOP016-P-0225E). See the new package dimensions section Built-in on/off function for the operation/stop of later of this datasheet. IC Incorporating circuit for short-circuit protec- tion and under-voltage lock-out (U.V.L.O.) The latch circuit is externally controllable. Low consumption current (during operation: 5 mA, during standby: 2 A) Applications LCD displays, digital still cameras, and PDAs Block Diagram Error amp. Latch V PWM1 REF Unlatch pro. Short pro. U.V.L.O. Unlatch pro. PWM2 OSC On/ Off Error amp. Publication date: December 2001 SDH00002BEB 1 1 16 CT V REF 15 2 Latch RT 14 3 IN+ On/Off 13 4 IN1 IN2 12 5 FB1 FB2 11 6 DTC1 DTC2 10 7 Out1 Out2 4.20.3 0.10.1 1.50.2 6.50.3 9 8 GND V CC (0.15)AN8011S Pin Descriptions Pin No. Symbol Description 1 CT Pin for connecting the oscillation frequency setting capacitor for triangular oscillation circuit. Frequency of triangular oscillation is set by connecting a capacitor between this terminal and GND. 2 RT Resistor connection pin for setting the oscillation frequency of triangular oscillation circuit. Frequency of triangular oscillation is set by connecting resistance between the pin and GND 3 On/OffOn/Of pin for turning on/off IC.Lo stops IC (output off) andHig operates IC. 4IN2 Inverted input pin for channel 2 error amplifier 5 F/B 2 Output pin for channel 2 error amplifier. Gain setting or phase compensation is perfor- med by connecting resistor or capacitor between the pin and IN2. It is also connected to PWM short-circuit protection. 6 DTC 2 Pin for setting dead-time period of channel 2. The dead-time of channel 2 is set by conn- ecting external resistor. Soft start function can be also given by connecting capacitor in parallel with the external resistor. In addition, only channel 2 output can be turned off by decreasing the pin voltage to below 0.12 V. (short-circuit protection function stop circuit) 7 Out 2 Channel 2 open-collector type output pin. I = 100 mA maximum O 8 GND Grounding pin of signal system. 9V Power supply voltage application pin. It detects start voltage and stop voltages CC 10 Out 1 Channel 1 open-collector type output pin. I = 100 mA maximum O 11 DTC 1 Pin for setting dead-time period of channel 1. The dead-time period of channel 1 is set by connecting external resistor. Soft start function can be also given by connecting capacitor in parallel with the external resistor. In addition, only channel 1 output can be turned off by decreasing the pin voltage to below 0.12 V. (short-circuit protection function stop circuit) 12 F/B 1 Output pin for channel 1 error amplifier. Gain setting or phase compensation is perfor- med by connecting resistor or capacitor between the pin and IN1. It is also connected to PWM short-circuit protection. 13 IN1 Inverted input pin for channel 1 error amplifier. 14 IN+ Pin for noninverted input of channel 1 error amplifier. 15 Latch Pin for connecting the time constant setting capacitor for timer latch type short-circuit protection circuit. The time constant for short-circuit protection is set by connecting a capa- citor between this terminal and GND. 16 V Internal reference voltage output pin (2.5 V (allowance: 3%)). If a load of 20 mA typical REF or more is applied, the overcurrent protection operates to reduce V and switching REF operation stops. SDH00002BEB 2