MAX1677EEE+ Maxim Integrated Products, MAX1677EEE+ Datasheet - Page 4

• 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
ELECTRICAL CHARACTERISTICS
(V
4
Note 1: The MAX1677 operates in bootstrap mode (operates from the output voltage). Once started, it will operate down to 0.7V
Note 2: C
Note 3: In low-power mode (CLK/SEL = GND), the output voltage regulates 1% higher than in low-noise mode (CLK/SEL = OUT or
Note 4: The device is in a startup mode when V
Note 5: Specifications to -40°C are guaranteed by design and not production tested.
LCD BIAS DC-DC
GENERAL
Supply Current
Main DC On, LCD Off
Supply Current All On,
Main DC-DC in PFM Mode
Supply Current All On,
Main DC-DC in PWM Mode
Supply Current in Shutdown
MAIN
Output Voltage
FB Regulation Voltage
Startup to Normal Mode Transition
Voltage (Note 4)
LX Leakage Current
LX Current Limit
Internal Oscillator
External Clock Frequency Range
LOGIC
ON Input Threshold
LCDON, LCDPOL, CLK/SEL
Input Threshold
LBI Falling Threshold
LBO Output Low Voltage
LCD BIAS DC-DC
LCDLX Switch Current Limit
LCDFB Set Point
OUT
_______________________________________________________________________________________
= 3.3V, C
input. If V
synchronized).
REF
PARAMETER
= 0.22µF for applications where I
REF
IN
= 0.1µF, POUT = OUT, T
exceeds the set V
OUT
V
V
SYMBOL
V
V
V
I
I
I
LOCKOUT
I
V
LX(LEAK)
ON(HIGH)
LX(PWM)
LCDOFF
ON(LOW)
LX(PFM)
FB(REG)
LBO(LO)
V
LBI(TH)
I
I
, V
PWM
V
PFM
V
OUT
f
IH
IL
A
OUT
= -40°C to +85°C, unless otherwise noted. ) (Note 5)
REF
OUT
will follow one diode drop below V
> 10µA.
is below this value.
No load, current into OUT
No load, current into OUT
No load, current into OUT
FB = GND, 0 ≤ I
CLK/SEL = OUT (Note 3)
Adjustable mode, CLK/SEL = OUT (Note 3)
N-channel PWM mode
N-channel PFM mode
CLK/SEL = OUT
1.1V < V
Sink current = 1mA
LCDPOL = OUT or GND
LCDPOL connected to OUT or GND
through 50kΩ
Negative LCD, LCDPOL = GND
Positive LCD, LCDPOL = OUT
OUT
< 5.5V
CONDITIONS
LX
≤ 350mA,
IN
.
0.8V
0.8V
3.17
1.22
1.22
MIN
550
250
240
200
599
300
150
2.1
-20
OUT
OUT
0.2V
0.2V
MAX
3.46
1.28
1.28
+20
300
900
500
360
400
OUT
629
450
300
OUT
2.4
0.1
40
60
5
5
UNITS
kHz
kHz
mA
mV
mA
mV
µA
µA
µA
µA
µA
V
V
V
V
V
V
V