MAX1677EEE+ Maxim Integrated Products, MAX1677EEE+ Datasheet - Page 6

• Manufacturer Part Number: MAX1677EEE+
• Description: IC DC-DC CONV DL HI EFF 16QSOP
• Manufacturer: Maxim Integrated Products
• Type: Step-Up (Boost)r

Specifications of MAX1677EEE+

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 3.3V or Adj Main, -28 ~ 28 V or Adj Secondary
• Current - Output: 350mA
• Frequency - Switching: 300kHz
• Voltage - Input: 0.7 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Power - Output: 696mW
• Output Voltage: 2.5 V to 5.5 V
• Output Current: 350 mA
• Input Voltage: 0.7 V to 5.5 V
• Supply Current: 35 uA
• Switching Frequency: 300 KHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Compact, High-Efficiency, Dual-Output
Step-Up and LCD Bias DC-DC Converter
6
(Circuits of Figures 2 and 3, T
_______________________________________________________________________________________
100mA/
200mA/
100mV/
100mA/
50mV/
10mV/
50mV/
2V/
div
div
div
2V/
div
div
div
div
div
div
WAVEFORMS (PFM MODE, 50mA OUTPUT)
2.4V
200mA I
LCDLX CURRENT LIMIT = 225mA,
2.4V
MAIN BOOST CONVERTER SWITCHING
MAIN BOOST CONVERTER SWITCHING
PFM, 1.2V
3.3V
IN
IN,
OUT
LCD SWITCHING WAVEFORMS
(50kΩ FROM LCDPOL TO OUT)
, 3.3V
+12V
WAVEFORMS (PWM MODE)
OUT
, 50mA I
IN
OUT
OUT,
,
,
10mA LOAD
OUT
1µs/div
10µs/div
2µs/div
A
= +25°C, unless otherwise noted.)
MAX1677-10
MAX1677-14
MAX1677-12
V
I
V
V
I
V
LX
V
I
V
LX
LX
LX
RIPPLE
LX
RIPPLE
LX
RIPPLE
Typical Operating Characteristics (continued)
100mA/
200mA/
100mV/
20mV/
200mA/
10mV/
50mV/
2V/
div
div
div
div
div
div
div
div
1.2V
20mA I
LDCLX CURRENT LIMIT = 350mA,
2.4V
MAIN BOOST CONVERTER SWITCHING
V
I
LOAD
IN
IN
IN,
= 2.4V, V
, 3.3V
LCD SWITCHING WAVEFORMS
OUT
= 0 to 200mA
+12V
WAVEFORMS (PFM MODE)
MAIN BOOST CONVERTER
OUT
OUT,
OUT
LOAD TRANSIENT
,
10mA LOAD
= 3.3V
2µs/div
5µs/div
2ms/div
MAX1677-11
MAX1677-13
MAX1677-15
V
I
V
LX
V
I
V
V
I
LX
LX
RIPPLE
OUT
LX
RIPPLE
RIPPLE