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Panasonic AN8018SA User Guide and Manual

Summary

This comprehensive guide details the AN8018SA, a high-efficiency, two-channel PWM DC-DC converter control IC. Specializing in low-voltage operation (down to 1.8V), this unit provides versatile step-up, step-down, or inverting power conversion for miniaturized applications. It is ideal for electronics designers creating highly reliable, portable power sources—such as those used in LCD displays, digital cameras, and PDAs—requiring robust fault protection and a wide operating range from 1.8V to 14V.

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查询AN8018供应商 Voltage Regulators

AN8018SA 1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC

Unit: mm

Overview The AN8018SA is a two-channel PWM DC-DC con- 5.0±0.2 verter control IC that features low-voltage operation.

This IC can obtain the step-up, step-down and invert- (1.0)

ing voltages with a small number of external components. The minimum operating voltage is as low as 1.8 V so that it can operate with two dry batteries. In addition, 0° to 10°

since it uses the 16-pin surface mounting type package 0.5±0.2

with 0.65 mm pitch, it is suitable for miniaturized highly efficient potable power supply.

Features +0.10 Seating plane

Wide operating supply voltage range (1.8 V to 14 V) Incorporating a high precision reference voltage circuit

SSOP016-P-0225A

(allowance: ± 2%) Control in a wide output frequency range is possible (20 k Hz to 1 MHz). Built-in wideband error amplifier (single gain bandwidth 10 MHz typical) Built-in timer latch short-circuit protection circuit

(charge current 1.1 µA typical)

Incorporating the under-voltage lock-out circuit (U.V.L.O.) (circuit operation-starting voltage 1.67 V typical)

Dead-time is variable. Flatness of switching current can be obtained by staggering the turn-on timing of each channel. Built-in unlatch function When DT1 pin is low level, or DT2 pin is high level, independent turn-off is possible. Incorporating a on/off control function (active-high control input, standby mode current: 5 µA maximum) Parallel operation is possible. Output block Totem pole 1 output Output source-current: −50 m A maximum (Constant current output with a less supply voltage fluctuation is possible by connecting an external resistor to pin 11) Output sink-current: +80 m A maximum Open-collector 1 output Output current: 50 m A maximum

Applications LCD displays, digital still cameras, and PDAs

Page Summary Contents For Panasonic AN8018SA User Guide and Manual

Page 1 查询AN8018供应商 Voltage Regulators AN8018SA 1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC Unit: mm Overview The AN8018SA is a two-channel PWM DC-DC con- 5.0±0.2 verter con...
Page 2 AN8018SA Voltage Regulators Block Diagram On/ Reference 1.19 V On/off Triangular wave off voltage source control oscillation 0.2 V Out1 Error amp. 1 Unlatch1 IN+1 U.V.L.O. Latch 0.9 V VCC RB2 SC FB2 S...
Page 3 Voltage Regulators AN8018SA Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage VCC Off terminal allowable application voltage VOFF IN+1 terminal allowable application voltage *2 VIN−...
Page 4 AN8018SA Voltage Regulators Electrical Characteristics at VCC = 2.4 V, CREF = 0.1 µF, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit U.V.L.O. block Circuit operation start voltage ...
Page 5 Voltage Regulators AN8018SA Electrical Characteristics at VCC = 2.4 V, CREF = 0.1 µF, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit PWM2 block Output full-off input threshold VT0-...
Page 6 AN8018SA Voltage Regulators Electrical Characteristics at VCC = 2.4 V, CREF = 0.1 µF, Ta = 25°C (continued) Design reference data (continued) Note) The characteristics listed below are theoretical val...
Page 7 Voltage Regulators AN8018SA Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description I/O VCC DT1: The pin for setting channel 1 output maximum duty ratio. FB1 OSC PWM If this te...
Page 8 AN8018SA Voltage Regulators Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit Description I/O VCC DT2: The pin for setting channel 2 output maximum duty ratio. If this terminal is se...
Page 9 Voltage Regulators AN8018SA Usage Notes [1] The loss P of this IC increases in proportion to the supply voltage. Use the IC so as not to exceed the allowable power dissipation of package PD . Referenc...
Page 10 AN8018SA Voltage Regulators Usage Notes (continued) [4] (continued) VCC ripple allowable range Po er is si pa tio ip pl fr eq ue nc z) Recommended operating range VCC ripple width (V[p-p]) Application...
Page 11 Voltage Regulators AN8018SA (m (m (O FF SO (O Application Notes (continued) [2] Main characteristics ISO(OUT)  RB ISI(OUT)  RB VCC = 2.4 V VCC = 14 V VCC = 14 V VCC = 2.4 V VCC = 7 V VCC = 7 V VCC =...
Page 12 AN8018SA Voltage Regulators Application Notes (continued) [3] Timing chart (inside waveform) VCC terminal voltage waveform 1.6 V Output short-circuit S.C.P. terminal voltage waveform OSC DT1 Channel 1...
Page 13 Voltage Regulators AN8018SA Application Notes (continued) [4] Function descriptions 1. Reference voltage block This block is composed of the band gap circuit, and outputs the temperature compensated 1...
Page 14 AN8018SA Voltage Regulators Application Notes (continued) [4] Function descriptions (continued) VOUT2 Error amplifier 2 4. Error amplifier 2 block (continued) block Also, it is possible to perform the...
Page 15 Voltage Regulators AN8018SA Application Notes (continued) [5] About logic of PWM block The logic for channel 1 and channel 2 of this IC is reversed. Thereby an input current flatness is realized. At t...
Page 16 AN8018SA Voltage Regulators Application Notes (continued) [6] Time constant setting method for timer latch short-circuit protection circuit The constructional block diagram of protection latch circuit...
Page 17 Voltage Regulators AN8018SA Application Notes (continued) [7] Parallel synchronous operation of multiple ICs Multiple instances of this IC can be operated in parallel. If the OSC terminals (pin 1) and...
Page 18 AN8018SA Voltage Regulators Application Notes (continued) [7] Parallel synchronous operation of multiple ICs (continued) 2. About the operation of short-circuit protection at parallel synchronous oper...
Page 19 Voltage Regulators AN8018SA Application Notes (continued) [8] Setting of Off-terminal connection resistor CTL The start circuit starts its operation when Q1 is turned on. In case of the resistor ROFF ...
Page 20 AN8018SA Voltage Regulators Application Notes (continued) [9] About sequential operation (continued) Out1 operation Out2 operation Operation when each channel single on/off [10] Error amplifier phase-...
Page 21 Voltage Regulators AN8018SA AC Analysis Result Simulation circuit IN−1 AC 1.19 V f  VPh f  VPh RO1 = 10 kΩ 1 kΩ RO1 = 10 kΩ CO1 = 0.01 µF CO1 = 1 000 p F f (Hz) f (Hz) f  VBD f  VBD CO1 = 0.01 µF ...
Page 22 AN8018SA Voltage Regulators ai d B Ph as AC Analysis Result (continued) f  Phase f  Phase RO1 = 0 0.001 µF RO1 = 10 kΩ CO1 = 1 µF CO1 = 0.1 µF f (Hz) f (Hz) ai d B Ph as f  Gain f  Gain RO1 = 0 CO...
Page 23 Voltage Regulators AN8018SA Application Circuit Examples Circuit construction for evaluation board Input SC L2 S. .P ff SBD VOUT2 IN +1 IN +2 ISO(OUT) CTLC7 C9 IN −1 FB AN8018SA ut ut VOUT1IOUT1 Evalu...
Page 24 AN8018SA Voltage Regulators Application Circuit Examples (continued) Application circuit example 1 (Input 5 V, output 15 V/−8 V) Input 5 V 22 kΩ 100 µH Output 2 to 0.1 µF 0.1 µF SC MA3X720 SC (MA720*)...
Page 25 Voltage Regulators AN8018SA Application Circuit Examples (continued) Application circuit example 3 (Input 12 V, Output 5 V/15 V) Input 12 V SC 0.1 µF 100 µH VOUT2 S. .P ff 1.19 V(typ.) 0.1 µF +15 V IN...
Page 26 AN8018SA Voltage Regulators Application Circuit Examples (continued) Application circuit example 4 (Circuit using the AN8017SA/AN8018SA) Input 1.8 V to 3.2 V Input voltage range: 1.8 V to 3.2 V Oscill...

Manual Details

Brand Panasonic
Pages 26
File Size 284.14 KB
Published July 16, 2026
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Frequently Asked Questions

What is the minimum operational supply voltage for this DC-DC converter?

The minimum operating voltage is as low as 1.8 V, allowing operation with two dry batteries.

How are output currents limited using this IC?

The output source current is rated up to -50 mA maximum, while the output sink current is +80 mA maximum.

What protective features does the AN8018SA incorporate?

It incorporates UVLO (Under-voltage lock-out), SCCP (Short-circuit protection circuit), and variable dead-time control.

How can I adjust or set the output current level?

The source current is adjusted by connecting an external resistor to Pin 11, allowing for constant current output.