MAX775ESA ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC ControllersGeneral Description ________
MAX775ESA+T ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-to-DC ControllersELECTRICAL CHARACTERISTICS(V+ = 5V, I = 0mA, C = 0.1µF, T = T to T , unless otherwise noted. Typica ..
MAX776 ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IApplicationsOrdering Information continued on last page.Data CommunicatorsTypical Operating Circuit ..
MAX776CPA ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC ControllersFeaturesThe MAX774/MAX775/MAX776 inverting switching ' 85% Efficiency for 5mA to 1A Load Currentsre ..
MAX776CSA ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC ControllersMAX774/MAX775/MAX77619-0191; Rev 1; 3/94-5V/-12V/-15V or Adjustable, High-Efficiency, Low I Inverti ..
MAX776CSA ,-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC ControllersGeneral Description ________
MB6M ,MINIATURE GLASS PASSIVATED SINGLE-PHASE BRIDGE RECTIFIERThermal Characteristics (TA = 25°C unless otherwise noted)Parameter Symbol MB2M MB4M MB6M UnitDevic ..
MB6S ,Bridge RectifiersThermal Characteristics (T = 25°C unless otherwise noted)AParameter Symbol MB2S MB4S MB6S UnitDevic ..
MB7117E , Schottky TTL 2048-Bit Bipolar Programmable Read-Only Memory
MB71A38-25 , PROGRAMMABLE SCHOTTKY 16384-BIT READ ONLY MEMORY
MB8117800A-60 ,2 M X 8 BIT FAST PAGE MODE DYNAMIC RAMapplications where very low power dissipation and high bandwidth are basic requirements of the desi ..
MAX774CPA-MAX774CSA-MAX774EPA-MAX774ESA-MAX775CPA-MAX775CSA-MAX775ESA-MAX776CPA-MAX776CSA-MAX776EPA-MAX776ESA
-5V/-12V/-15V or Adjustable, High-Efficiency, Low IQ Inverting DC-DC Controllers
_______________General DescriptionThe MAX774/MAX775/MAX776 inverting switching
regulators deliver high efficiency over three decades of
load current. A unique current-limited, pulse-
frequency-modulated (PFM) control scheme provides
the benefits of pulse-width modulation (high efficiency
with heavy loads), while using less than 100µA of sup-
ply current (vs. 2mA to 10mA for PWM converters). The
result is high efficiency over a wide range of loads.
These ICs also use tiny external components; their high
switching frequency (up to 300kHz) allows for less than
5mm diameter surface-mount magnetics.
The MAX774/MAX775/MAX776 accept input voltages from
3V to 16.5V, and have preset output voltages of
-5V, -12V, and -15V, respectively. Or, the output voltage
can be user-adjusted with two resistors. Maximum
VIN - VOUTdifferential voltage is limited only by the break-
down voltage of the chosen external switch transistor.
These inverters use external P-channel MOSFET switch-
es, allowing them to power loads up to 5W. If less
power is required, use the MAX764/MAX765/MAX766
inverting switching regulators with on-board MOSFETs.
________________________ApplicationsLCD-Bias Generators
High-Efficiency DC-DC Converters
Battery-Powered Applications
Data Communicators
____________________________Features85% Efficiency for 5mA to 1A Load CurrentsUp to 5W Output Power100µA Max Supply Current5µA Max Shutdown Current3V to 16.5V Input Range-5V (MAX774), -12V (MAX775), -15V (MAX776),
or Adjustable Output VoltageCurrent-Limited PFM Control Scheme300kHz Switching Frequency
______________Ordering Information
Ordering Information continued on last page.* Contact factory for dice specifications.
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers
________________________________________________________________Maxim Integrated Products1
__________________Pin Configuration
__________Typical Operating Circuit
Call toll free 1-800-998-8800 for free samples or literature.19-0191; Rev 1; 3/94
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGSSupply Voltages
V+ to OUT...........................................................................21V
V+ to GND..............................................................-0.3V, +17V
OUT to GND........................................................-0.3V, to -17V
REF, SHDN, FB, CS...................................-0.3V to (V+ + 0.3V)
EXT...............................................(VOUT- 0.3V) to (V+ + 0.3V)
Continuous Power Dissipation (TA= +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C).............727mW
SO (derate 5.88mW/°C above +70°C)..........................471mW
CERDIP (derate 8.00mW/°C above +70°C)..................640mW
Operating Temperature Ranges:
MAX77_C__.........................................................0°C to +70°C
MAX77_E__......................................................-40°C to +85°C
MAX77_MJA...................................................-55°C to +125°C
Maximum Junction Temperatures:
MAX77_C__/E__...........................................................+150°C
MAX77_MJA..................................................................+175°C
Storage Temperature Range.............................-65°C to +160°C
Lead Temperature (soldering, 10sec).............................+300°C
ELECTRICAL CHARACTERISTICS(V+ = 5V, ILOAD= 0mA, CREF= 0.1mF, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers
_______________________________________________________________________________________3
ELECTRICAL CHARACTERISTICS (continued)
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers_______________________________________________________________________________________
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)101000
MAX774EFFICIENCY vs. LOAD CURRENT
VOUT = -5V (BOOTSTRAPPED)MAX1774/5/6-01a
LOAD CURRENT (mA)
EFFICIENCY (%)
MAX774
EFFICIENCY vs. LOAD CURRENTVOUT = -5V (NON-BOOTSTRAPPED)
MA774/5/6--1b
LOAD CURRENT (mA)
EFFICIENCY (%)1000
MAX774
EFFICIENCY vs. TEMPERATURE
MAX774/5/6-2
TEMPERATURE (°C)
EFFICIENCY (%)06080100
MAX776
EFFICIENCY vs. LOAD CURRENT
VOUT = -15V (BOOTSTRAPPED)MA774/5/6-1c
LOAD CURRENT (mA)
EFFICIENCY (%)1000100
MAX774/MAX775/MAX776EFFICIENCY vs. LOAD CURRENT
VOUT = -24V (NON-BOOTSTRAPPED)MA774/5/6--1f
LOAD CURRENT (mA)
EFFICIENCY (%)1000100
MAX776
EFFICIENCY vs. LOAD CURRENT
VOUT = -15V (NON-BOOTSTRAPPED)MA774/5/6-1d
LOAD CURRENT (mA)
EFFICIENCY (%)1000100
MAX775
EFFICIENCY vs. OUTPUT CURRENT
VOUT = -12V (BOOTSTRAPPED)MA774/5/6--1
OUTPUT CURRENT (mA)
EFFICIENCY (%)1000100
MAX774/MAX775/MAX776
EFFICIENCY vs. LOAD CURRENT
VOUT = -24V OUTPUT (ZENER CONNECTION)MA774/5/6--1g
LOAD CURRENT (mA)
EFFICIENCY (%)100041016
MAX774
EFFICIENCY vs. INPUT VOLTAGEVOUT = -5V AT 100mAMAX774/5/6-3
INPUT VOLTAGE (V)
EFFICIENCY (%)61214
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers
_______________________________________________________________________________________5SWITCH OFF-TIME vs. TEMPERATURE
MAX761-13
TEMPERATURE (°C)
tOFF
(µs)120
_____________________________Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
START-UP VOLTAGE
vs. LOAD CURRENT (BOOTSTRAPPED)
MA744/5/6-14
LOAD CURRENT (mA)
START-UP VOLTAGE (V)1000
START-UP VOLTAGE
vs. LOAD CURRENT (NON-BOOTSTRAPPED)
MA744/5/6-15
LOAD CURRENT (mA)
START-UP VOLTAGE (V)1000
MAX774
MAXIMUM LOAD vs. INPUT VOLTAGE
MAX774/5/6-16
INPUT VOLTAGE (V)
LOAD CURRENT (mA)61214
EXT RISE AND FALL TIMES
vs. TEMPERATURE
MAX774/5/6-9
TEMPERATURE (°C)
tRISE &
tFALL
(ns)200-2080120100
EXT RISE AND FALL TIMES
vs. TEMPERATURE
MAX774/5/6-10
TEMPERATURE (°C)
tRISE &
tFALL
(ns)200-2080120100
SWITCH ON-TIME vs. TEMPERATURE
MAX761-13
TEMPERATURE (°C)
ton
(µs)120
SWITCH ON-TIME/OFF-TIME RATIO
MAX774/5/6-6
TEMPERATURE (°C)
tON
OFF
RATIO (µs/µs)200-2080120100
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX774/5/6-7
TEMPERATURE (°C)
ICC
(µA)200-2080120100
3.0
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers_______________________________________________________________________________________ OPERATING SUPPLY CURRENT
vs. TEMPERATURE
MAX774/5/6-8
TEMPERATURE (°C)
ICC
(µA)200-2080120100
REFERENCE
TEMPERATURE COEFFICIENT
MAX774/5/6-12
TEMPERATURE (°C)
REFERENCE OUTPUT (V)200-2080120100
CS TRIP LEVEL
MAX774/5/6-11
TEMPERATURE (°C)
CS TRIP LEVEL (mV)200-2080120100
REFERENCE
OUTPUT RESISTANCE
MAX774/5/6-13
TEMPERATURE (°C)
REFERENCE OUTPUT RESISTANCE (200-2080120100
_____________________________Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers
_______________________________________________________________________________________7
__________________________________________Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
MAX774/MAX775/MAX776
-5V/-12V/-15V or Adjustable,
High-Efficiency, Low IQInverting DC-DC Controllers_______________________________________________________________________________________
______________________________________________________________Pin Description
____________________________Typical Operating Characteristics (continued)(TA = +25°C, unless otherwise noted.)
