RE46C107 Datasheet, PDF (4/7 Pages) Microchip Technology – DC to DC Converter, Voltage Regulator and Piezoelectric Horn Driver

RE46C107
DC to DC Converter, Voltage Regulator and Piezoelectric Horn Driver
Product Specification
R&E International
Electrical Characteristics (continued)
Limits apply at Vdd=3V, Vss=Vss2=0V, Creg=10uF, Cvo=10uF, T_A=0°C to 50°C, unless otherwise noted.
Typical values are at T_A=27°C.
Parameter
VO Efficiency
Low Battery
Threshold
LBST to LBOUT
Propagation Delay
VREG Voltage
Symbol
Voeff1
Voeff2
Vlbat
Tplhlb
Vreg1
Vreg2
VREG Load
Regulation
Brownout
Threshold
VO-to-Brownout
Margin
Brownout Pull
down
VREG over voltage
clamp
Vregld1
Vregld2
Vobvt
Vobvtm
Ibt
Vcl1
Vcl2
Test
Pin
3
16
10
10
10
10
11
11
10
10
10
Test Conditions
Iload= 10mA, Vdd=3V;
HRNEN=0V
Iload=100uA; Vdd=3V;
HRNEN=0V
LBST=Vreg
Vdd=2.1; LBSET Cload=5pF
Iout<20mA; REGSEL=Vdd
Iout<20mA; REGSEL=Vss
Iout=0 to 20mA; HRNEN=Vreg
Iout=0 to 20mA; HRNEN=0V
Falling edge of VO
Vv02 -Vobvt
VO=3.0V; Vreg=2.0V
REGSEL=Vdd
REGSEL=0V
Limits
Min Typ Max
85
75
2.4
30
3.1
3.3
3.5
2.8
3.0
3.2
50
50
3.6
100
400
20
40
3.75
4
4.25
3.35
3.6
3.85
Units
%
%
V
us
V
V
mV
mV
V
mV
mA
V
V
Notes on Electrical Characteristics:
1/ DC-DC converter in high boost mode (nominal VO=10V) can draw current pulses of greater than 1 Amp and is therefore very
sensitive to series resistance. Critical components of this resistance are the inductor DC resistance, the internal resistance of the
battery and the resistance in the connections from the inductor to the battery, from the inductor to the LX pin and from the Vss2 pin
to the battery. In order to function properly under full load at Vdd=2V, the total of the inductor and interconnect resistances should
not exceed 0.3 ohm. The internal battery resistance should be no more than 0.5 ohm and a low ESR capacitor of 10uF or more
should be connected in parallel with the battery to average current draw over the boost converter cycle.
2/ In the Electrical Characteristics Table, wherever a specific VO value is listed under test conditions, the VO is forced externally
with the inductor disconnected and the DC-DC converter is NOT running.
3/ The brown-out threshold voltage is the VO voltage at which the regulator and horn will be disabled. At VO voltages below the
brown-out threshold Vreg will be pulled to Vss.
4/ In normal operation, the regulator will provide high-side current of up to 20mA, but current sinking capability is typically under 1uA.
The overvoltage clamp is intended to limit the voltage at Vreg when it is pulled up by an external source.
5/ The limits shown are 100% tested at 25C only. Test limits are guard-banded based on temperature characterization to guarantee
compliance at temperature extremes.
Telephone [phone]
Facsimile 610.992.0734
E-mail: [e-mail]
Page 4 of 7
DS-RE46C107-012107
This datasheet contains PROPRIETARY and CONFIDENTIAL information.