MAX16945 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Inverting Charge Pump in SOT23 for EMI-Sensitive Automotive Applications

19-4241; Rev 1; 6/09
30mA Inverting Charge Pump in SOT23
for EMI-Sensitive Automotive Applications
General Description
The MAX16945 ultra-small, monolithic, CMOS charge-
pump voltage inverter accepts an input voltage ranging
from +1.4V to +5.5V. This device features an ultra-low
12Ω output resistance, permitting loads of up to 30mA
at +105°C with maximum efficiency. The MAX16945
operates at a frequency of 125kHz, allowing use of
small external components. Its small external compo-
nents, micropower shutdown mode, and wide tempera-
ture range make this device ideal for both automotive
and industrial applications.
Oscillator control circuitry and four power MOSFET
switches are included on-chip. The MAX16945 comes
in a 6-pin SOT23 package and operates over -40°C
to +105°C.
Features
o +1.4V to +5.5V Input Voltage Range
o 30mA Guaranteed Output Current at +105°C
o Slew-Rate Limited to Reduce EMI
o 0.1µA Logic-Controlled Shutdown
o Low 12Ω Output Resistance
o Startup Current Limited
o 6-Pin SOT23 Package
o AEC-Q100 Qualified
Applications
Automotive and Industrial Equipment
Small LCD Panels
Negative Supply from +5V or +3.3V Logic
Supplies
GaAsFET Bias Supplies
Handy-Terminals, PDAs
Ordering Information
PART
TEMP RANGE PIN-PACKAGE
MAX16945TGUT#
-40°C to +105°C
6 SOT23
MAX16945TGUT/V+ -40°C to +105°C
6 SOT23
#Denotes a RoHS-compliant device that may include lead that
is exempt under RoHS requirements.
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
Note: The MAX16945 requires a special solder temperature
profile described in the Absolute Maximum Ratings section.
Typical Operating Circuit
Pin Configuration
1µF
INPUT
1.5V TO 5.5V
C1+
IN
C1-
OUT
MAX16945
ON
SHDN
OFF
GND
NEGATIVE
OUTPUT
-1 ✕ V_IN
60mA
1µF
TOP VIEW
OUT 1
6 C1+
MAX16945
IN 2
5 SHDN
C1- 3
4 GND
SOT23
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.