MAX1748EUE+ Maxim Integrated Products, MAX1748EUE+ Datasheet - Page 7

• Manufacturer Part Number: MAX1748EUE+
• Description: IC DC-DC CONV TRPL LCD 16-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1748EUE+

• Applications: Converter, TFT, LCD
• Voltage - Input: 2.7 ~ 5.5 V
• Number Of Outputs: 3
• Voltage - Output: 2.7 ~ 13 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Output Voltage: 13 V
• Output Current: 0.5 A
• Input Voltage: 5.5 V
• Supply Current: 1 mA
• Switching Frequency: 1000 KHz
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Meter Display Type: LCD
• Supply Voltage Range: 2.7V To 5.5V
• Driver Case Style: TSSOP
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +85°C
• Output Voltage Min: 2.7V
• Rohs Compliant: Yes
• Input Voltage Max: 5.5V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(Circuit of Figure 5, V
PIN
1
2
3
4
5
6
7
10V
2V
0
0
0
R
V
NAME
MAIN
MAIN
INTG
GND
MAIN BOOST STARTUP WAVEFORM
RDY
MAX1748 POWER-UP SEQUENCING
REF
FBP
FB
IN
_______________________________________________________________________________________
IN
= 1kΩ, V
= 10V, V
= 3.3V, T
NEG
MAIN
= -5V, V
Active-Low, Open-Drain Output. Indicates all outputs are ready. The on-resistance is 125Ω (typ).
Main Boost Regulator Feedback Input. Regulates to 1.248V nominal. Connect feedback resistive
divider to analog ground (GND).
Main Boost Integrator Output. If used, connect 470pF to analog ground (GND). To disable integrator,
connect to REF.
Supply Input. +2.7V to +5.5V input range. Bypass with a 0.1µF capacitor between IN and GND, as
close to the pins as possible.
Analog Ground. Connect to power ground (PGND) underneath the IC.
Internal Reference Bypass Terminal. Connect a 0.22µF capacitor from this terminal to analog ground
(GND). External load capability to 50µA.
Positive Charge-Pump Regulator Feedback Input. Regulates to 1.25V nominal. Connect feedback
resistive divider to analog ground (GND).
= 10V
2ms/div
1ms/div
A
= +25°C, unless otherwise noted.)
POS
= 15V
MAX1748/8726 toc18
MAX1748/8726 toc16
Typical Operating Characteristics (continued)
V
2V/div
V
2V/div
V
5V/div
I
500mA/div
V
5V/div
V
5V/div
V
10V/div
LX
SHDN
SHDN
MAIN
MAIN
NEG
POS
Triple-Output TFT-LCD
10V
2V
FUNCTION
0
0
0
V
V
MAIN
MAIN
MAX8726 POWER-UP SEQUENCING
= 10V, V
= 10V, R
DC-DC Converters
WAVEFORM WITH LOAD
MAIN BOOST STARTUP
NEG
MAIN
= -5V, V
= 50Ω (200mA)
4ms/div
1ms/div
POS
= 15V
MAX1748/8726 toc19
MAX1748/8726 toc17
Pin Description
V
5V/div
V
5V/div
V
5V/div
V
10V/div
V
2V/div
V
5V/div
I
500mA/div
LX
SHDN
MAIN
NEG
POS
SHDN
MAIN
7