MAX1697 Maxim, MAX1697 Datasheet
MAX1697
Manufacturer Part Number
MAX1697
Description
60mA / SOT23 Inverting Charge Pump with Shutdown
Manufacturer
Maxim
Datasheet
1.MAX1697.pdf
(12 pages)
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The 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
12Ω output 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.
19-1499; Rev 0; 7/99
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Negative Supply from +5V or +3.3V Logic Supplies
Small LCD Panels
GaAsFET Bias Supplies
Handy-Terminals, PDAs
Battery-Operated Equipment
ON
1.5V to 5.5V
INPUT
OFF
Typical Operating Circuit
________________________________________________________________ Maxim Integrated Products
IN
SHDN
C1+
General Description
MAX1697U
60mA, SOT23 Inverting Charge Pump
GND
1 F
C1-
OUT
Applications
1 F
NEGATIVE
OUTPUT
-1 · V
60mA
IN
Note: The MAX1697 is available with four different operating
frequencies. Choose the desired frequency from the table
below and insert the suffix in the blank above to complete the
part number.
MAX1697_EUT-T
60mA Output Current
Low 12Ω Output Resistance
150µA Supply Current (MAX1697R)
Requires Only Two 1µF Capacitors (MAX1697U)
Start-Up Current Limited
+1.25V to +5.5V Input Voltage Range
0.1µA Logic-Controlled Shutdown
Slew-Rate Limited to Reduce EMI
6-Pin SOT23 Package
PART NO.
SUFFIX
TOP VIEW
PART
U
R
S
T
OUT
C1-
IN
with Shutdown
TEMP. RANGE
-40°C to +85°C
FREQUENCY
1
2
3
Ordering Information
(kHz)
SOT23-6
MAX1697
125
250
12
35
Pin Configuration
6
5
4
C1+
SHDN
GND
6 SOT23-6
PIN-PACKAGE
Features
MARK
AABW
AABV
AABX
AABY
TOP
1
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