HT45F2020 datasheet(11/85 Pages) HOLTEK

11 / 85 page

Rev. 1.00

April 11, 2017

Rev. 1.00

April 11, 2017

HT45F2020/HT45F2022

Sound Effect Generator Flash MCU

HT45F2020/HT45F2022

Sound Effect Generator Flash MCU

Shunt Regulator Electrical Characteristics – for HT45F2020 only

Ta=25°C

Symbol

Parameter

Condition

Min. Typ. Max. Unit

VUNREG

Supply Voltage

—

VOUT1

Load Voltage – No Load in

Room Temperature

VUNREG=8V~16V

ISUPPLY=ISHUNT(Max) @ VUNREG=16V

MCU in SLEEP mode, no load

-3%

+3%

VOUT2

Load Voltage – Load and supply

voltage within specification

ISUPPLY=ISHUNT(Max) @ VUNREG=16V

Select RSER (1) as MCU in SLEEP mode

with no load condition

1. VUNREG=8V, ILOAD=ILOAD(Max)

2. VUNREG=16V, ILOAD=0

-5%

+5%

ILOAD

Load Current (2)

VUNREG=8V~16V,

RSER=(16-VOUT1) / ISHUNT(Max)

—

ISHUNT(Max)

Maximum Shunt Current

VUNREG=16V

—

ISTATIC

Maximum Static Current

VUNREG=16V

—

∆VLINE

Line Regulation

VUNREG=8 V to 16V

RSER=(16V – VOUT1) / ISHUNT(Max)

MCU in SLEEP mode, no load

—

0.3

%/V

∆VOUT_RIPPLE Output Voltage Ripple

VUNREG=8 V to 16V,

RSER=(16V – VOUT1) / ISHUNT(Max)

MCU alternately consumes the average

current IMCU and ILOAD(Max).

The MCU varies its consumption current

once every 0.5ms (3)

—

100

∆VLOAD

Load Regulation

VUNREG=8V, 12V or 16V

RSER=(16V – VOUT1) / ISHUNT(Max)

ILOAD=0mA to ILOAD(Max),

CBYPASS=4.7μF, MCU in SLEEP mode

—

0.03 %/mA

RSER

ISUPPLY

VUNREG

VOUT

CBYPASS

ISHUNT

VDD

Feedback

VSS

ILOAD

VDD

VSS

Shunt Regulator Operational Block Diagram

Note:1.RSER=(VUNREG–VOUT)/ISUPPLY

2.Theloadcurrentmaximumspecificationvalueiscalculatedbasedonthefollowingformula.

ILOAD(Max)=ISHUNT(Max)×(VUNREG(Min)–VOUT1(Max))/(VUNREG(Max)–VOUT1(Min))–ISTATIC(Measured)

VUNREG(Max),VOUT1(Max)=MaximumspecificationvalueforVUNREGandVOUT1respectively

VUNREG(Min),VOUT1(Min)=MinimumspecificationvalueforVUNREGandVOUT1respectively

3.IMCU=MCUcurrentconsumptionmeasuredwhentheMCUtogglestwoI/Opinsevery0.5ms

withnoload.

HT45F2020 Datasheet(PDF) 11 Page - Holtek Semiconductor Inc

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