MAX1880EUG Maxim Integrated Products, MAX1880EUG Datasheet - Page 16

• Manufacturer Part Number: MAX1880EUG
• Description: DC/DC Switching Converters
• Manufacturer: Maxim Integrated Products

Specifications of MAX1880EUG

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Quad-Output TFT LCD DC-DC
Converters with Buffer
4.50V
4.00V
3.50V
4.50V
4.00V
3.50V
16
(Circuit of Figure 1, V
BUF+ = FLTSET = TGND = PGND = GND, T
A. V
B. BUFOUT = BUF-, 0.5V/div
C
______________________________________________________________________________________
BUF
BUF
= 1μF, V
+ = 3.50V TO 4.50V, 0.5V/div
LARGE-SIGNAL RESPONSE
SUPB
VCOM BUFFER
= 8V
8.1V
7.8V
10μs/div
4V
2V
4V
2V
0
0
A. RDY, 2V/div
B. BUFOUT = BUF-, C
C. V
BUF+ = GND
SUPB
IN
VCOM BUFFER STARTUP
= V
= +3.3V, SHDN = IN, V
MAIN
MAX1778 toc48
= 8V, I
100μs/div
BUF
MAIN
= 1μF, 2V/div
A
B
= 20mA, 200mV/div
A
-200mA
200mA
= +25°C.)
4.2V
4.0V
3.8V
8.0V
MAX1778 toc51
Typical Operating Characteristics (continued)
0
A. I
B. BUFOUT = BUF-, 200mV/div
C. V
V
SUPB
BUFOUT
MAIN
= V
LOAD-TRANSIENT RESPONSE
A
B
C
MAIN
= 8V, 50mV/div
MAIN
= 200mA PULSES, 200mA/div
, BUF+ = GND, C
VCOM BUFFER
= V
4μs/div
SUPP
BUF
= V
= 1μF
8.1V
7.8V
4V
2V
4V
2V
MAX1778 toc49
SUPN
0
0
A. RDY, 2V/div
B. BUFOUT = BUF-, C
C. V
BUF+ = GND
SUPB
= V
A
B
C
VCOM BUFFER STARTUP
= V
SUPB
MAIN
-500mA
500mA
4.5V
4.0V
3.5V
8.0V
= 8V, I
100μs/div
0
BUF
= V
A. I
B. BUFOUT = BUF-, 0.5V/div
C. V
V
SUPB
MAIN
= 1μF, 2V/div
BUFOUT
MAIN
SUPL
= V
LOAD-TRANSIENT RESPONSE
= 20mA, 200mV/div
= 8V, 100mV/div
MAIN
= 400mA PULSES, 500mA/div
, BUF+ = GND, C
= 8V, BUF- = BUFOUT,
VCOM BUFFER
MAX1778 toc51
4μs/div
BUF
A
B
C
= 1μF
MAX1778 toc50
A
B
C