MAX1677EEE Maxim Integrated Products, MAX1677EEE Datasheet - Page 5

• 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

(Circuits of Figures 2 and 3, T
100
100
70
90
80
60
50
40
90
80
70
60
450
400
350
300
250
200
150
100
50
0
0.1
0.1
0
CIRCUIT OF FIGURE 2
A: V
B: V
C: V
PFM MODE
A = V
B = V
PWM MODE
C = 2.4V
D = 1.2V
V
TESTED WITH
RESISTIVE LOAD
OUT
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
IN
IN
IN
0.5
IN
IN
= 3.6V
= 2.4V
= 3.3V
= 1.2V
1
= 2.4V
= 1.2V
vs. STARTUP VOLTAGE
START-UP VOLTAGE (V)
(LCD V
LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT
1.0
1
B
(V
_______________________________________________________________________________________
OUT
OUT
10
Step-Up and LCD Bias DC-DC Converter
1.5
= 3.3V)
A
PWM
Compact, High-Efficiency, Dual-Output
= 12V)
10
2.0
A
C
D
100
= +25°C, unless otherwise noted.)
PFM
B
2.5
A
C
1000
100
3.0
100
100
80
0.20
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
90
70
60
50
80
60
40
20
0
0
0.1
0.1
0
CIRCUIT OF FIGURE 2
A: V
B: V
C: V
EFFICIENCY vs. LOAD CURRENT
EFFICIENCY vs. LOAD CURRENT
NO-LOAD SUPPLY CURRENT vs.
IN
IN
IN
0.5
= 3.6V
= 2.4V
= 1.2V
INPUT VOLTAGE (LCD OFF)
D
1
1.0
LOAD CURRENT (mA)
(LCD V
LOAD CURRENT (mA)
INPUT VOTAGE (V)
1
(V
E
F
OUT
1.5
A
OUT
10
= 5V)
C
B
2.0
Typical Operating Characteristics
= 20V)
C
PFM MODE
D: V
E: V
F: V
10
PWM MODE
A: V
B: V
C: V
2.5
V
PFM MODE
LCD OFF
100
B
IN
IN
IN
IN
OUT
IN
IN
= 2.4V
= 1.2V
= 3.6V
= 2.4V
= 1.2V
= 3.6V
A
= 3.3V
3.0
1000
100
3.5
1.2550
1.2525
1.2500
1.2475
1.2450
700
600
500
400
300
200
100
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0
0
0
NO-LOAD SUPPLY CURRENT vs.
0.5
0.5
vs. BATTERY INPUT VOLTAGE
MAXIMUM LOAD CURRENT
V
vs. REFERENCE CURRENT
20
INPUT VOLTAGE (LCD ON)
OUT
REFERENCE VOLTAGE
1.0
REFERENCE CURRENT (µA)
1.0
= 3.3V
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
(PWM MODE)
1.5
40
1.5
2.0
2.0
60
2.5
V
PFM MODE
V
OUT
LCD
2.5
V
3.0
OUT
= 3.3V
= -20V
80
= 5V
3.0
3.5
100
4.0
3.5
5