MAX1778EUG+ Maxim Integrated Products, MAX1778EUG+ Datasheet - Page 17

• Manufacturer Part Number: MAX1778EUG+
• Description: IC DCDC CONV MULTI OUT 24TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1778EUG+

• Applications: Converter, TFT, LCD
• Voltage - Input: 2.7 ~ 5.5 V
• Number Of Outputs: 5
• Voltage - Output: 2.7 ~ 13 V
• Operating Temperature: 0°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MAX1778
MAX1881
10
11
12
13
1
2
3
4
5
6
7
8
9
MAX1880
MAX1882
10
11
12
1
2
3
4
5
6
7
8
9
−
______________________________________________________________________________________
PIN
MAX1883
MAX1884
10
11
1
2
3
4
5
6
7
8
9
−
−
MAX1885
10
1
2
3
4
5
6
7
8
9
−
−
−
BUFOUT
Quad-Output TFT LCD DC-DC
SHDN
NAME
SUPL
BUF+
SUPB
GND
INTG
FBN
BUF-
REF
FBP
FB
IN
Main Step-Up Regulator Feedback Input. Regulates to 1.25V
nominal. Connect a resistive divider from the output (V
to analog ground (GND).
Main Step-Up Integrator Output. When using the integrator,
connect 1000pF to analog ground (GND). To disable the
integrator, connect INTG to REF.
Main Supply Voltage. The supply voltage powers the control
circuitry for all of the regulators and may range from 2.7V to 5.5V.
Bypass with a 0.1µF capacitor between IN and GND, as close to
the pins as possible.
VCOM Buffer (Operational Transconductance Amplifier) Positive
Feedback Input. Connect to GND to select the internal resistive
divider that sets the positive input to half the amplifier’s supply
voltage (V
VCOM Buffer (Operational Transconductance Amplifier) Negative
Feedback Input
VCOM Buffer (Operational Transconductance Amplifier) Supply
Voltage
VCOM Buffer (Operational Transconductance Amplifier) Output
Analog Ground. Connect to power ground (PGND) underneath the
Internal Reference Bypass Terminal. Connect a 0.22µF ceramic
Positive Charge-Pump Regulator Feedback Input. Regulates to
Negative Charge-Pump Regulator Feedback Input. Regulates to
Active-Low Shutdown Control Input. Pull SHDN low to force the
Low-Dropout Linear Regulator Input Voltage. Can range from 4.5V
IC.
capacitor from REF to analog ground (GND). External load
capability up to 50µA.
1.25V nominal. Connect a resistive divider from the positive
charge-pump output (V
0V nominal. Connect a resistive divider from the negative charge-
pump output (V
controller into shutdown. If unused, connect SHDN to IN for normal
operation. A rising edge on SHDN clears the fault latch.
to 15V. Bypass with a 1µF capacitor to GND (see Capacitor
Selection and Regulator Stability). Connect both input pins
together externally.
Converters with Buffer
BUF+
= V
NEG
SUPB
) to FBN to the reference (REF).
POS
/2).
) to FBP to analog ground (GND).
FUNCTION
Pin Description
MAIN
) to FB
17