MAX1677EEE Maxim Integrated Products, MAX1677EEE Datasheet - Page 3

• Manufacturer Part Number: MAX1677EEE
• Description: IC CONV DC-DC STEP-UP 16-QSOP
• 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: Contains lead / RoHS non-compliant

ELECTRICAL CHARACTERISTICS (continued)
(V
LX On-Resistance
LX Current Limit
P-Channel Synchronous Rectifier
Turn-Off Current in PFM Mode
Internal Oscillator
Oscillator Maximum Duty Cycle
External Clock Frequency
Range
LOGIC AND CONTROL INPUTS
Input Leakage Current
ON Input Threshold
LCDON, LCDPOL, CLK/SEL
Input Threshold
LBI Falling Threshold
LBI Hysteresis
LBO Output Low Voltage
LBI Input Bias Current
LBO Leakage Current
LCDLX Voltage
LCDLX Switch Current Limit
LCDLX Switch Resistance
LCDLX Leakage Current
LCDFB Set Point
LCDFB Input Bias Current
LCD Line Regulation
LCD Load Regulation
Maximum LCDLX On-Time
Minimum LCDLX Off-Time
LCDFB Voltage for
Startup Mode
OUT
= 3.3V, C
PARAMETER
REF
= 0.1µF, POUT = OUT, T
_______________________________________________________________________________________
Step-Up and LCD Bias DC-DC Converter
Compact, High-Efficiency, Dual-Output
I
V
SYMBOL
R
V
V
R
I
LBO(LEAK)
I
I
V
LBI(BIAS)
t
LX(PWM)
ON(HIGH)
R
LX(PFM)
ON(LOW)
ON LCD
LX(ON)N
LX(ON)P
LBO(LO)
LBI(TH)
LCDLX
V
V
D
f
IH
IL
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
N-channel
P-channel
N-channel PWM mode
N-channel PFM mode
CLK/SEL = OUT
ON, LCDON, LCDPOL, CLK/SEL
1.1V < V
V
Sink current = 1mA
V
LCDPOL = OUT or GND
LCDPOL connected to OUT or GND through
50kΩ
V
V
Positive LCD, LCDPOL = OUT
Negative LCD, LCDPOL = GND
I
Figure 2
I
Figure 2
Operating mode
Start-up mode (positive or negative)
LCDPOL = OUT
LCDPOL = GND
LOAD
LOAD
OUT
OUT
LCDLX
LBO
> 2.5V
= 5.5V
= 3.3V
= 5mA, V
= 0 to 5mA, V
= 28V
OUT
< 5.5V
IN
CONDITIONS
= 1.2V to 3.6V,
IN
= 2.4V,
0.8V
0.8V
1.225
MIN
550
250
240
200
599
300
150
-15
3.4
0.8
3.0
40
80
OUT
OUT
TYP
0.22
1.25
0.75
670
350
300
614
350
225
0.4
1.0
0.1
0.5
4.3
4.0
0.5
90
85
1
0
1
A
= +25°C.)
0.2V
0.2V
1.275
MAX
800
450
140
360
400
629
450
300
0.5
1.0
0.1
1.4
5.2
1.2
5.0
90
50
28
15
50
OUT
OUT
1
1
1
UNITS
kHz
kHz
%/V
mA
mA
mV
mA
mV
µA
nA
µA
µA
nA
µs
µs
%
%
%
Ω
Ω
V
V
V
V
V
V
3