MAX1765EEE+ Maxim Integrated Products, MAX1765EEE+ Datasheet - Page 18

• Manufacturer Part Number: MAX1765EEE+
• Description: IC DC-DC CONV 800MA LN 16QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Up (Boost)r

Specifications of MAX1765EEE+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 2.5 ~ 5.5 V
• Current - Output: 800mA
• Frequency - Switching: 1MHz
• Voltage - Input: Adj down to 0.7V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Power - Output: 667mW
• Output Voltage: 2.5 V to 5.5 V
• Output Current: 800 mA
• Input Voltage: 0.7 V to 5.5 V
• Supply Current: 100 uA
• Switching Frequency: 1200 MHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

the regulator turns on. The switch must be pressed
long enough for the microcontroller (µC) to exit reset
and drive ONA high. A small capacitor is added to help
debounce the switch. The µC issues a logic high to
ONA, which holds the device on, regardless of the
switch state. To turn the regulator off, press the switch
again, allowing the µC to read the switch status and
pull ONA low. When the switch is released, ONB is
pulled high.
800mA, Low-Noise, Step-Up DC-DC Converter
with 500mA Linear Regulator
Figure 10. Typical Phone Application
Table 5. Typical Available Output Current
18
______________________________________________________________________________________
NUMBER OF CELLS
3 NiCd/NiMH or 1 Li+
1 NiCd/NiMH
2 NiCd/NiMH
CONTROL
INPUTS
I/O
GND
µ
C
LX
MAX1765
OUTL
POUT
INL
INPUT VOLTAGE
RF
(V)
1.2
2.4
2.4
3.6
PA
Figure 11. Momentary Pushbutton On/Off Switch
TRANSISTOR COUNT: 1735
ON/OFF
OUTPUT VOLTAGE
(V)
3.3
3.3
5.0
5.0
270k
0.1µF
ONB
ONA
MAX1765
Chip Information
POUT
270k
OUTPUT CURRENT
(mA)
330
730
460
720
V
I/O
I/O
DD
µC