MAX1817EUB Maxim Integrated Products, MAX1817EUB Datasheet - Page 5

• Manufacturer Part Number: MAX1817EUB
• Description: IC CONV DUAL DCDC STEP 10-UMAX
• Manufacturer: Maxim Integrated Products
• Type: Step-Up (Boost)r

Specifications of MAX1817EUB

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 2
• Voltage - Output: 3.3V or Adj Main, -28 ~ 28 V or Adj Secondary
• Current - Output: 125mA
• Frequency - Switching: 500kHz
• Voltage - Input: 1.5 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Power - Output: 444mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

(Circuit of Figure 3, T
95
90
85
80
75
70
0.1
A: V
V
OUT
IN
= 5V
MAIN OUTPUT EFFICIENCY
= 3.3V,
1
vs. LOAD CURRENT
C: V
V
LOAD CURRENT (mA)
OUT
18
16
14
12
10
IN
8
6
4
2
0
0
= 3.3V
0
_______________________________________________________________________________________
A
= 2.4V,
A: I
B: V
C: V
V
1.0
B: V
V
IN
OUT
= +25°C, unless otherwise noted.)
LX
10
= 2.4V, V
E: V
V
OUT
LX
IN
OUT
, 500mA/div
, 5V/div
= 5V
CIRCUIT OF FIGURE 2
= 2.4V,
vs. INPUT VOLTAGE (LCD OFF)
, 50mV/div, AC-COUPLED
IN
Compact, High-Efficiency, Dual-Output
1.5
NO-LOAD SUPPLY CURRENT
= 3.3V
= 1.8V,
SWITCHING WAVEFORM
OUT
D: V
V
100
MAIN CONVERTER
OUT
INPUT VOLTAGE (V)
= 3.3V, I
2.0
IN
= 5V
= 1.8V,
10µs/div
LOAD,OUT
2.5
1000
3.0
= 50mA, V
3.5
75
70
65
60
55
50
45
40
35
30
25
MAX1817-06
ONLCD
0.01
4.0
= 0
A
B
C
LCD OUTPUT EFFICIENCY
0.1
vs. LOAD CURRENT
LOAD CURRENT (mA)
Step-Up DC-DC Converter
A: V
B: V
C: V
D: V
E: V
F: V
IN
IN
IN
IN
1
IN
IN
= +2.4V, V
= +2.4V, V
= +1.8V, V
= +1.8V, V
= +2.4V, V
= +1.8V, V
Typical Operating Characteristics
V
NO LOAD
10
LCD
LCD
LCD
LCD
OUT
LCD
LCD
F
C
E
= 18V
= 24V
= 12V
= 18V
= 3.3V,
= 24V
= 12V
B
D
450
400
350
300
250
200
150
100
A
50
0
0
0
100
0
A: I
B: V
C: V
V
V
IN
LCD
LXLCD
LCD
= 2.4V, V
LXLCD
= 18V, I
NO-LOAD SUPPLY CURRENT
1
, 100mV/div, AC-COUPLED
, 500mA/div
SWITCHING WAVEFORM
, 10V/div
160
140
120
100
vs. INPUT VOLTAGE
OUT
80
60
40
20
LOAD,LCD
0
LCD CONVERTER
INPUT VOLTAGE (V)
2
1.0
= 3.3V, I
STARTUP VOLTAGE vs. LOAD CURRENT
RESISTIVE LOAD
LCD OFF
4µs/div
= 5mA
1.1
3
LOAD,OUT
V
R1 = 1MΩ, R2 = 75kΩ
LCD
1.2
STARTUP VOLTAGE (V)
= 18V, NO LOAD
4
= 0,
V
OUT
1.3
5
= 3.3V
MAX1817-07
1.4
6
1.5
A
B
C
1.6
1.7
5