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MAX1697S-EUTT-MAX1697SEUT-T-MAX1697UEUT-T
60 mA, inverting charge pump with shutdown, 35 kHz.
General DescriptionThe MAX1697 ultra-small, monolithic, CMOS charge-
pump voltage inverter accepts an input voltage ranging
from +1.25V to +5.5V. This device features an ultra-low
12Ωoutput resistance, permitting loads of up to 60mA
with maximum efficiency. The MAX1697 is available
with operating frequencies of 12kHz, 35kHz, 125kHz, or
250kHz, allowing optimization of supply current or
external component size. Its small external components
and micropower shutdown mode make this device
ideal for both battery-powered and board-level voltage
conversion applications.
Oscillator control circuitry and four power MOSFET
switches are included on-chip. Applications include
generating a negative supply from a +5V or +3.3V logic
supply to power analog circuitry. All versions come in a
6-pin SOT23 package and deliver 60mA.
For applications with lower current requirements, the
MAX1719/MAX1720/MAX1721 are pin-compatible
SOT23 charge pumps that supply up to 25mA.
ApplicationsNegative Supply from +5V or +3.3V Logic Supplies
Small LCD Panels
GaAsFET Bias Supplies
Handy-Terminals, PDAs
Battery-Operated Equipment
Features60mA Output Current Low 12ΩOutput Resistance150µA Supply Current (MAX1697R)Requires Only Two 1µF Capacitors (MAX1697U)Start-Up Current Limited+1.25V to +5.5V Input Voltage Range0.1µA Logic-Controlled Shutdown Slew-Rate Limited to Reduce EMI6-Pin SOT23 Package
MAX1697
60mA, SOT23 Inverting Charge Pump
with Shutdown
Pin Configuration
Typical Operating Circuit19-1499; Rev 0; 7/99
Note: The MAX1697 is available with four different operatingfrequencies. Choose the desired frequency from the table
below and insert the suffix in the blank above to complete the
part number.
MAX1697
60mA, SOT23 Inverting Charge Pump
with Shutdown
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, capacitors from Table 2, VIN= +5V, SHDN= IN, TA
= 0°C to +85°C, unless otherwise noted. Typical values are at= +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.
IN to GND.................................................................-0.3V to +6V
C1+, SHDNto GND.....................................-0.3V to (VIN + 0.3V)
C1- to GND..............................................(VOUT- 0.3V) to + 0.3V
OUT to GND.............................................................+0.3V to -6V
OUT Output Current............................................................90mA
OUT Short-Circuit to GND.............................................Indefinite
Continuous Power Dissipation (TA= +70°C)
6-Pin SOT23 (derate 14mW/°C above +70°C) ................1.1W
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10sec).............................+300°C
MAX1697
60mA, SOT23 Inverting Charge Pump
with Shutdown
ELECTRICAL CHARACTERISTICS(Circuit of Figure 1, capacitors from Table 2, VIN= +5V, SHDN= IN, TA
= -40°C to +85°C, unless otherwise noted.) (Note 2)
ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, capacitors from Table 2, VIN= +5V, SHDN= IN, TA
= 0°C to +85°C, unless otherwise noted. )Typical values are at= +25°C.)
Note 1:Output resistance is guaranteed with capacitor ESR of 0.3Ωor less.
Note 2:All specifications from -40°C to +85°C are guaranteed by design, not production tested.
MAX1697
Typical Operating Characteristics(Circuit of Figure 1, capacitors from Table 2, VIN= +5V, SHDN= IN, TA= +25°C, unless otherwise noted.)
60mA, SOT23 Inverting Charge Pump
with Shutdown
MAX1697
60mA, SOT23 Inverting Charge Pump
with Shutdownypical Operating Characteristics (continued)(Circuit of Figure 1, capacitors from Table 2, VIN= +5V, SHDN= IN, TA= +25°C, unless otherwise noted.)
MAX1697
60mA, SOT23 Inverting Charge Pump
with Shutdownypical Operating Characteristics (continued)(Circuit of Figure 1, capacitors from Table 2, VIN= +5V, SHDN= IN, TA= +25°C, unless otherwise noted.)