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MAX736CPDMAXN/a35avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX736CPDMAXIMN/a50avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX736CWEMAXIMN/a2avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX736EPDMAXN/a322avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX736EWEMAXIM ?N/a13avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX737CPDMAXIMN/a6avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX737CWEMAXIMN/a40avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX737EPDMAXIMN/a19avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX739CPDMAXIMN/a50avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX739CWEN/a14avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX739EWEMAXIMN/a22avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX759CPDMAXIMN/a34avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX759CWEN/a50avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
MAX759EWEMAXIMN/a51avai-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators


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MAX736CPD-MAX736CWE-MAX736EPD-MAX736EWE-MAX737CPD-MAX737CWE-MAX737EPD-MAX739CPD-MAX739CWE-MAX739EWE-MAX759CPD-MAX759CWE-MAX759EWE
-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM Regulators
19-4749; Rev 3; 5/93
AVIMHXH/M]
-5V, -12V, "SM, and Adjustable
Inventing ©urrenbModle IPWM Regulators
General Description
The MAX736/MAX737/MAX739/MAX759 are CMOS, in-
verting, switch-mode regulators with an internal power
MOSFET. Guaranteed output power for the MAX739 is
1.25W when powered from a +4.5V input, and 1.5W when
powered from +6V. Quiescent supply current for the
MAX739 is typically 1.7mA, and a shutdown mode reduces
this to IPA. These power-conserving features, along with
high efficiency and an application circuit that lends itself to
miniaturization, make these parts excel in a broad range of
on-card and portable equipment applications.
The MAX736/MAX737/MAX739 have fixed outputs of -12V,
-15V, and -5V respectively. The MAX759 is adjustable from 0V
to -15V. Output voltages beyond -15V require a transformer.
These inverting DC-DC converters employ a high-perfor-
mance, current-mode, pulse-width modulation (PWM) con-
trol scheme to provide tight output voltage regulation and
low noise. The fixed-frequency oscillator is factory-trimmed
to 165kHz, allowing easy noise filtering. The devices are
production tested in an actual application circuit, and
output accuracy is guaranteed at t5% over all specified
conditions of line, load, and temperature.
The input voltage range is +4V to +15V. For similar devices
with smaller packages and an input voltage range of +4V
to +11V, refer to the MAX735/MAX755 data sheet.
Applications
Low-Noise Analog Signal Processing Circuits
LCD Bias Supplies
Power Supplies for ECL
Board-Level DC-DC Conversion
Battery-Powered Equipment
Computer Peripherals
Typical Operating Circuit
Features
. Pre-Set -5V, -12V, -15V or Adjustable Outputs
. Convert Positive Voltages to Negative
. 1.25W Guaranteed Output Power
. 83% Typical Effitrleney
. 1.7mA Qulescent Current (MAX739)
. 1rsA Shutdown Mode (MAX739)
t +4V to +15V Input Voltage Range
. 165kHz Current-Mode PWM - Low Noise and Jitter
. Undervoltage Lockout and Soft-Start Protection
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAXT36CPD O'C to +70'C 14 Plastic DIP
MAX736CWE trc to +70'C 16 Wide so
MAX7360/D JC to +70'C Dice'
MAX736EPD -40'C to +85'C 14 Plastic DIP
MAX736EWE -40'C to +850 16 Wide SO
MAX736MJD -55'C to +125'C 14 CERDIP"
MAX737CPD O'C to +70'C 14 Plastic DIP
MAX737CWE JC to +70'C 16 Wide SO
MAX737C/D JC to +700 Dice'
MAX737EPD MOT) to +85'C 14 Plastic DIP
MAX737EWE -40'C to +85'C 16 Wide so
MAX737MJD -55T) to +125'C 14 CERDIP"
Ordering Informatlon continued on last page of data sheet.
. Contact factory for dice specifications.
"Contact factory for availability and processing to MIL-S TtT883.
Pin Configurations
CN TO 11V
33uF snow ' Vout -
sr VREF DRV- j
.auFI MAXIM
T . MAX739 IA IN5817 Vout
r-- AN
GND "H I
SURFACE-MOUHT APPIJCATION
TOPVIEW
lle E E "
sri-ON E MAXIM E "
VREF E MAX737 E Dt
" a ma a u
ss E fi] GND
N.C. [E E] rmv-
cc LE E] Vow
Pin Configurations continued on lasipaga.
Call toll free 1-800-998-8800 for free samples or literature.
6912f VWGELXVW/L ELWW/QEAXVW
Maxlm Integrated Products 3-177
MAX 736/MAX 73 7/MAX739/MAX759
-5V, -12V, -15V, and Adjustable
inverting Current-Mode PWM Regulators
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V+ to GND) (Note 1)
MAX739/MAX759 ........................ 15.5V, -O.3V
MAX736 ................................. 9.5V, -0.3V
MAX737 ................................. 6.5V, -0.3V
Maximum input/Output Ditttrrtmtlat
MAX736IMAX737 ............................... 22V
MAX739IMAX759 (Non-Boorstrapped) ............. 22V
MAX739IMAX759 (Bootstrapped) ................. 17V
Negative Drive Voltage (DRV- to V+) ............ -17V, +0.3V
Switch Voltage (LX to V+) .................. -22.5V, +0.3V
Feedback Voltage (VOUT to GND) ................... e..WN
Auxiliary Ingut Voltages
(SS, CC, SHDN to GND) ............. -0.3V to (V+ + 0.3V)
Peak Switch Current (ix) 'Fl.........-.. 2.5A
Reference Current (IVREF) ........................ 2.5mA
Continuous Power Dissipation (TA = +70'C)
14-Pin Plastic DIP (derate 10.00mW/'C above +70'C) . . BOOmW
16-Pin Wide so (derate 9.52mW/' C above +70'C) . . . 762mW
14-Pin CERDIP (derate 9.09mW/‘C above +70'C) . , ' 727mW
Operating Temperature Ranges:
MAX73_ /MAX7590_ _ ................... crc to +70'C
MAX73_ /MAX759E_ - ................... -40"C to +85'C
MAX73_ IMAX759MJD .................. -55'C to +125"C
Junction Temperatures:
MAX73_ IMAX759FJC_ - ....................... +150'C
MAX73_ IMAX759MJD ......................... +175‘C
Storage Temperature Range .............. 650 to +160'C
Lead Temperature (soldering, 10sec) .............. +300'C
Note 1: Output voltages beyond -5V or bootstrapped operation reduce the allowable supply voltage. See Maximum lnput/Output
Differentialspecifications.
Stresses be nd those listed under 'Absolule Maximum Ratings' may cause permanent damage to the titwice. These are stress ratings only. and functional
operation a the device at these or an other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions or extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
Bootstrapped Mode (Circuit of Figure 1, V+ = 5V, ILOAD = 0mA, DRV- = Vour (-5V) (MAX739/MAX759), TA = TMIN to TMAX, unless
otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
DRV- 2 -7V MAX736 4.0 8.6
Input Voltage Range DRV- a -10V MAX737 4.0 5.5 V
DRV- 2 .5.25v MAX739/MAX759 4.0 11 .0
A';,',;.'-.',',)'),';',)'; " 1 .40 -1 2.80
V+ = 6V to 8.6V MAX736
ILOAD= 0mAto'125mA -11.40 -12.60
Output Voltage ('o;f=5/y,t,oA5tahy,,A MAX737 -14.25 -l 5.75 V
V+ = 4.5V to 11v_ MAX739 -4.750 -5.250
'LOAD = 0mA to 250mA MAX759 (Notes 2, 3) -4.775 -s.225
V+ = 4.5V to s.sv 100 140
MAX736
V+ = 6V to 8.6V 125 150
V+ = 4.5V to 5.5V MAX737 100 110
Output Current ht :105¥:‘011g/5.C 250 300 mA
1tr4si'yctct'o1,1hsc (eil,7ilfMAX759 200 250
V+ = 6V to 11V 300 500
MAX736 4.2 6.0
Supply Current MAX737 6.1 9.5 mA
MAX739 1.7 3.5
MAX759 2.2 4.0
3:139 -
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