MAX634 ,CMOS, Micropower, Inverting Switching RegulatorELECTRICAL CHARACTERISTICS
(+VS = +6.0V, TA = +25°C, unless otherwise noted)
MAx634 MAX4391 - ..
MAX6340UK29+ ,Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout DelayMAX6340/MAX6421– Low-Power, SC70/SOT µP Reset Circuits MAX6426 with Capacitor-Adjustable Reset Time ..
MAX6341 ,1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage ReferencesApplications Ordering InformationHigh-Resolution Analog-to-Digital MAXand Digital-to-Analog Convert ..
MAX6341CSA+ ,1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage ReferencesMAX6325/MAX6341/MAX63501ppm/°C, Low-Noise, +2.5V/+4.096V/+5VVoltage References
MAX6341ESA+ ,1ppm/°C, Low-Noise, +2.5V/+4.096V/+5V Voltage ReferencesApplications Ordering InformationHigh-Resolution Analog-to-Digital MAXand Digital-to-Analog Convert ..
MAX6342LUT-T ,Microprocessor reset circuit with power-fail comparator. Reset threshold 4.63V. Push-pull active-low reset output, manual-reset input.Applicationsreset thresholds from 2.33V to 4.63V (see Selector Guides 1, 2).Portable ComputersInser ..
MB15E05SLPV1 ,Single Serial Input PLL Frequency Synthesizer On-Chip 2.0 GHz PrescalerFUJITSU SEMICONDUCTORDS04-21360-4EDATA SHEETASSPSingle Serial Input PLL Frequency SynthesizerOn-chi ..
MB15E06 ,Single Serial Input PLL Frequency Synthesizer On-Chip 2.5 GHz PrescalerFUJITSU SEMICONDUCTORDS04-21336-2EDATA SHEETASSPSingle Serial InputPLL Frequency SynthesizerOn-Chip ..
MB15E06PFV1 ,Single Serial Input PLL Frequency Synthesizer On-Chip 2.5 GHz PrescalerFUJITSU SEMICONDUCTORDS04-21336-2EDATA SHEETASSPSingle Serial InputPLL Frequency SynthesizerOn-Chip ..
MB15E07 ,Single Serial Input PLL Frequency Synthesizer FUJITSU SEMICONDUCTORDS04-21343-1EDATA SHEETASSPSingle Serial InputPLL F ..
MB15E07SLPFV1 ,Single Serial Input PLL Frequency Synthesizer On-Chip 2.5 GHz PrescalerFUJITSU SEMICONDUCTORDS04-21358-3EDATA SHEETASSPSingle Serial Input PLL Frequency SynthesizerOn-chi ..
MB15F02L ,Dual Serial Input PLL Frequency Synthesizer FUJITSU SEMICONDUCTORDS04–21353–1EDATA SHEETASSPDual Serial Input PL ..
MAX634
CMOS, Micropower, Inverting Switching Regulator
$13572 Revo 5/86
2AMLili "2C I] 2flMl
CMOS Micropower
Inverting Switching Regulator
- * General Description
Maxim's MAX634 and MAX4391 CMOS DC-DC regu-
lators are designed for simple, efficient, inverting
DC-DC converter circuits. The MAX634 and MAX4391
switching regulators provide all control and power
handling functions in a compact 8 pin package: a
1.25V bandgap reference, an oscillator, a comparator
for output voltage regulation, and a 525mA P-channel
output MOSFET. A second comparator is also pro-
vided for convenient low battery detection.
The operating current is typically 100PA and is nearly
independent of output switch current and duty cycle,
thus ensuring high efficiency even in low power
battery operated systems. Operating in the inverting
configuration, the MAX634 and MAX4391 can convert
a positive input voltage in the range of +3V to 16.5V
to any negative output voltage up to -20V.
These devices are pin compatible enhancements of
the Raytheon bipolar circuit, RC4391. Improvements
include significantly higher efficiency, extended low
voltage operation and improved output voltage
accuracy (MAX634).
Maxim manufactures a broad line of DC-DC CorWer-
ters, including the MAX635, MAX636, and MAX637;
which reduce the external component count in fixed
-5V, -12V, and 15V output DC-DC converter circuits.
See Table 2 on the last page of this data sheet for a
summary of other Maxim DC-DC converters,
- Applica tions
High Efficiency Battery Powered DC-DC
Converters
Board Level. Local Power Supply Generation
Regulated Negative Output Power Supplies
,IN to ;12V or I15V Power Conversion
Regulated Voltage Inverters
Pin Configuration
- ------- _ - Features
. Converts Positive Voltage to Negative Voltage
. Low Operating Current-100A
. Compact 8 Pin MiniDlP and SO Packages
. High Efficiency-MP/o Typical
t Low Battery Detector
. 4% Output Voltage Accuracy (MAX634)
. +3V to +16.5V Input Voltage Range
. Adjustable Output Voltage
--Up to -20V with Simple Coil
-Virtually Unlimited Voltage with
Transformer
_ - - Ordering Information
iwer TEMP. RANGE I PACKEE A
MAX634O D 0°C mime 03*
MAXBMCPA 0°C to ~70°C _ a Lead PlastTcAblF’
MAX634CSX 000 to -70'C a Lead Smail Outline"
MAX634EPA 40"C to H35''C a Lead PlastiCBiP
WQéAESA 240°C}; '85"C ' 8 Lead Small Outline
TAAXGMEJA H 40'C to -85''C 8 Leah CEFTDIP _
MAX684MJA lssnc to 42500 8 Lead CEFiDE”
LTix4391c/ro - 7000 to v70=c Dice _
MAX4391EV 0°C tr,%rc -rrjah:nastic DIP
slAX439Idi7A V 0% to +70''C a Lead Small Out the a
MAxizagiEPA - -40'C to 05°C §LEéd$~asiic DIP -
MAX4391ESAW 40°C to 435°C ‘0 Lead Small Outline
Wx-tééiEJ/a -40'=c to 485=ch a Lead CERHIP -
-Mrda:s91MlA-' L55°503125°c e Leac CERDIP -
- Typical Operating Circuit
_ 'hVIN H(
Top View 5 =
I Lilll As Vrg 8 av 001
o v El T
Lim l 8 m MAXI/Vl
E -2. Lilo MAX634 VRH
MIJXI/Vi
L8ll E MAX634 El VHEF
MAX4391 3
Ex E El mlls H tr mm Lt
min]: a Lt ' l
+5V to 5V Converter
MAXIM Vi
Maxim Integrated Products 1
Call toll free 1-800-998-8800 for free samples or literature.
http://www.loq.com/
Iv GEVXVW/VEQXVW
CMOS Micropower
Inverting Switching Regulator
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (Note l) ............................... +18V Power Dissipation
Storage Temperature Range ................. -65°C to +160°C Plastic DIP (derate B.33mW/"C above +50°C) ...... 625mW
Lead Temperature(suldering.10 seconds) .. Small Outline (derate 6mW/°C above 60°C) ... _. 450mW
Operating Temperature Range CER DIP (derale Ble°C above 050°C) ........... 800mW
MAX634C, MAX4391C ..................... 0°C to -70'C Input Voltage. Pnns 1. 3, 8 (Note 2) .......... -C) 3V to +V< *O.3V
MAX634E, MAX4391E ................... -40% to v85°C Lx Output Current ............................. 525mA Peak
MAX634M, MAX4391M .................. -55''C to +1250C LBD Output Current ................................. SOmA
Stresses above those l/sled under "Absolule Maximum Harings' may cause permanent damage Io me dewce These are stress rahngs only, and functional
operation of the dewce at these or any other cond/I/ons above those mdtcated In the operational SGCHONS of the spec1frcar/ons IS not Imp/red Exposure to
absolute maumum rahngs Eondmons /or extended DBNOUS may affect devrce relrabII/ly
ELECTRICAL CHARACTERISTICS
(rVs = *6.0V. TA = +25°C. unless otherwise noted)
MAxéaa
MAX634/MAX4391
MAX4391 -
PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. MIN. TYP. MAX. UNITS
Supply Voltage (Note 1) tVs, 2.3 16.5 4.0 16 5 V
No External Loads
Supply Current 1m 'Vs = 4OV 70 150 90 250 PA
'Vs = 16.5V 150 500 170 500
VOUT rl0rT1 7 -5 0V -5.20 -4.80 -5.35 -4 65
Output Voltage V001 V001 m a -15 av -15 70 -14BO -15.85 -14,15 V
Vour mom = -5 0V o
Lune Regulation (Note 4) VIN = 5OV to 15V 2.0 3.0 mvum
Vour mom = -5.0V
Ws = 4.5V, Cx : 350pF 04 O 4
[ . PLOAD = OmW to 75mW 0,
Load Regulation (Note 4) Vow "W = -15 OV “’ch
'Vs = d.5V, Cx = 350PF 0.14 on4
PLOAD ' OmW to 75mW
Reference Voltage 1.22 1.25 1.28 1.18 1 25 1 32 V
Switch Current lsw Pin 5 2 5.0V 75 150 75 150 mA
Switch Leakage Current lco Pin 5 I -18V, +VS 7 6V 0.01 1.0 0 01 5.0 pA
Capacitor Charging Current '0x 30 30 MA
l C, 1_Tlyesh0ld Voltage +VS 7 ill, 'N/s 7 0.1 V t -
C, 7 Threshold Voltage 01 01 V
Operating Frequency Range
(Note 3) F0 0,1 75 0.1 75 kHz
Low Battery Output Current lLED lh, = 0.4V. V‘ :1,1V 500 1000 250 600 0A
Low Battery Output Leakage lLEDO V5 = 16.5V. v, : 1.4V 0.01 3 0 0.01 5 0 MA
Low Battery Input Threshold VLBR 1.25 1 25 V
Low Battery Input Bias Current ls, 0.01 10 0.01 10 nA
Feedback Input Bias Current G, 0Ol 10 0.01 10 nA
Efficiency Figure2 80 80 %
Note 1: In addition lo the Absolute Maximum rating ot 018V. the Input voltage also must not exceed 24 7 [’Voml-
Note 2: The input voltage hmi! may be exceeded prowded Input current IS Ilmned to less than 1mA
Note 3: The operatmg1requency range IS guaranteed by design and vermea wnh sample testmg.
Note 4: Guaranteed by corrtyation wwth DC pulse measurements.
2 lVl/JXI/VI
http://www.loq.com/
