MAX737CWE+T ,-12V, Inverting, PWM, Current-Mode DC-DC ConverterELECTRICAL CHARACTERISTICS
Bootstrapped Mode (Circuit of Figure 1, V+ = w, ILOAD = 0mA, DRV- = V ..
MAX737EPD ,-5V,-12V,-15V, and Adjustable Inverting Current-Mode PWM RegulatorsELECTRICAL CHARACTERISTICS
Bootstrapped Mode (Circuit of Figure 1, V+ = w, ILOAD = 0mA, DRV- = V ..
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MAX736CPD+-MAX737CWE+T-MAX759EWE+T
-12V, Inverting, PWM, Current-Mode DC-DC Converter
2fllALfjr2CfLfllAl
-5V, " 21/, -15V, and Adjustable
lnverting Current-Mode PWM 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 trom +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-perior-
mance, current-mode, pulse-width modulation (PWM) con-
trol scheme to provide tight output voltage regulation and
low noise. The tixed-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
t Convert Positive Voltages to Negative
. 1.25W Guaranteed Output Power
. 83% Typical Efficiency
. 1.7mA Gulescent Current (MAX739)
. 111A Shutdown Mode (MAX739)
O +4V to +15V Input Voltage Range
. 165kHz Current-Mode PWM - Low Noise and Jitter
. Undervoitage Lockout and Soft-Start Protection
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX736CPD 0°C to +70'C 14 Plastic; DIP
MAX736CWE DC to +70'C 16 Wide SO
MAX736C/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% to +125'C 14 CERDIP"
MAX737CPD JC to +70'C 14 Plastic DIP
MAX737CWE JC to +70'C 16 Wide so
MAX737C/D crc to +70'C Dice'
MAX737EPD -40'C to +85"C 14 Plastic DIP
MAX737EWE -40'C to +85'C 16 Wide SO
MAX737MJD -55'C to +125'C 14 CERDIP"
Ordering lnformatlon conllnuod on last page of data sheet.
. Contact factory for dice specifications.
"Contact factory for availability and processing to MIL-STD-883.
Pin Configurations
CN 101W
3W: SHDN Vout j
T s-C VHEF DRV-
3AsF MAXIM
T ' MAX739 IN5817 vom
[TI- ss Dt P lu
zznr - CC GND mun + 33WF
I J, - l
stmFhtthM10KThPnltymtm
TOPVIEW
" E E "
ra" E MAXIM 13 V+
MAX736
VHF MAX737 12 Ut
MAX739
" 4 MAX759 E] Dt
ss ct GND
NI). Lis] El DRV-
CC LE El Vom
Pin Conflguratlons continued on lastpage.
Call toll free 1-800-998-8800 for free samples or literature.
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GSLXVW/GELXVW/LELXVW/QELWW
Maxim Integrated Products _3-177
-5V, -12V, -15V, and Adjustable
inverting Gurrent-Mode PWM Regulators
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V+ to GND) (Note I)
Continuous Power Dissipation (TA = +70'C)
MAX739/MAX759 ........................ 15.5V, As34 14-Pin Plastic DIP (derate 10.00mWI'C above +70'C) . . BDOmW
MAX736 ................................. 9.5V, -0.3V 16-Pin Wide so (derate 9.52mWI‘ C above +70'C) . . . 762mW
MAX737 ................................ 6.5V, -O.3V 14-Pin CERDIP (derate 9.09mW/' C above +70"C) . . . 727mW
Maximum lrtputK9utput Differential Operating Temperature Ranges:
MAX736IMAX737 ............................... 22V MAX73_ /MAX7SQC__ .................... trc to +70‘C
MAX739IMAX759 iNon-Bootstrappet0 ............. 22v MAX73_ /MAX759E_ - ................... 400 to +850
MAX739IMAX759 (Bootstrapped) ................. 17V MAX73_ IMAX759MJD .................. -55T to +125'C
Negative Drive Voltage (DRV- to V+) ............ -17V. +0.3V Junction Temperatures:
Switch Voltage (LX to V+) .................. -22.5V, +0.3V MAX73_ lMAX759E/C_ - F...................... +150'C
Feedback Voltage (VOUT to GND) ................... 150V MAX73_ /MAX759MJD $.1_.1_.6F.__.__.......et +175'C
Auxiliary Ingut Vo oltages Storage Temperature Range ............. 65'C to +160'C
(SS, CC, SHDN to GND) ............ -0. 3V to (V+ + O. 3V) Lead Temperature (soldering, 10sec) ............. +300'C
Peak Switch Current (le) .t...b_F.FFr.F....$..6F.F. 2.5
Reference Current (IVREF) ........................ 2, 'et
Note 1: Output voltages beyond- AN or bootstrapped operation reduce the allowable supply voltage. See Maximum lnput/Output
Differential specifications.
Stresses beyond those listed under 'Absolure Maximum Ratings' may cause Per.Tar.lent damage to the device. These are stress ratings only and functional
operation t the device at these or ant] other conditions beyond those indicatedi In the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
Bootstrapped Mode (Circuit of Figure l, V+ = 5V, ILOAD = 0mA, DRV- =
otherwise noted.)
VOUT(-5V) (MAX739/MAX759), TA = TMIN to TMAX, unless
MAX 736/MAX 73 7MAX739/MAX759
PARAMETER CONDITIONS MIN TYP MAX UNITS
DRV- 2 -rv MAX736 4.0 8.6
Input Voltage Range DRV- 2 -10V MAX737 4.0 5.5 V
DRV- 2 -5.25v MAX739/MAX759 4.0 11 .o
V+ = 4.5V to 8.6V, -11.40 -l .
i/Loioe: 0mg: 100mA MAX736 2 60
0 v I ILBXD = 6% to'125mA -11.40 -12.60 v
ut ut O ta e
p g At,g4cg,'flg'/= MAX737 -14.25 -l 5.75
V+ = 4.5V to 11V, MAX739 -4.750 -5.250
'LOAD = 0mA to 250mA MAX759 (Notes 2, 3) -4.775 -5.225
V+ = 4.5V to 8.6V 100 140
MAX736
V+ = 6V to 8.6V 125 150
V+ = 4.5V to 5.5V MAX737 100 110
Output Current (t == 33%02515'0 250 300 mA
1t:6sis'yctio1,1hs, ('t,'flifl/MAX759 200 250
V+ = 6V to 11V 300 500
MAX736 4.2 6.0
MAX737 6.1 9.5
Supply Current mA
MAX739 1.7 3.5
MAX759 2.2 4.0
3171, MAXIM
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