MAX1880EUG Maxim Integrated Products, MAX1880EUG Datasheet - Page 10

• 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
(Circuit of Figure 1, V
BUF+ = FLTSET = TGND = PGND = GND, T
10
200mA
8.1V
8.0V
7.9V
100
90
80
70
60
50
40
30
1A
______________________________________________________________________________________
0
0
STEP-UP CONVERTER LOAD-TRANSIENT
0
A. I
B. V
C. INDUCTOR CURRENT, 1A/div
C
NEGATIVE CHARGE-PUMP EFFICIENCY
INTG
MAIN
MAIN
= 1000pF
V
SUPN
= 20mA to 200mA, 200mA/div
= 8V, 100mV/div
10
vs. LOAD CURRENT
= 6V
RESPONSE
I
40μs/div
NEG
20
(mA)
IN
= +3.3V, SHDN = IN, V
V
V
V
SUPN
SUPN
NEG
30
MAX1778 toc13
= 8V
= -5V
= 7V
40
A
B
C
A
= +25°C.)
200mA
Typical Operating Characteristics (continued)
-10
-12
-14
8.1V
8.0V
7.9V
-2
-4
-6
-8
1A
0
0
OUTPUT VOLTAGE vs. SUPPLY VOLTAGE
2
STEP-UP CONVERTER LOAD-TRANSIENT
A. I
B. V
C. INDUCTOR CURRENT, 1A/div
INTG = REF
MAXIMUM NEGATIVE CHARGE-PUMP
RESPONSE WITHOUT INTEGRATOR
MAIN
MAIN
MAIN
4
= 20mA to 200mA, 200mA/div
= 8V, 100mV/div
I
NEG
= V
6
= 1mA
V
40μs/div
SUPN
SUPP
8
I
NEG
(V)
= 10mA
= V
10
SUPN
MAX1778 toc14
12
= V
14
A
B
C
SUPB
1.27
1.26
1.25
1.24
1.23
7.9V
0.5A
8.0V
0.5A
1A
= V
0
0
0
STEP-UP CONVERTER LOAD-TRANSIENT
A. I
B. V
C. INDUCTOR CURRENT, 500mA/div
SUPL
MAIN
MAIN
vs. REFERENCE LOAD CURRENT
= 0 to 500mA, 500mA/div
20
RESPONSE (1μs PULSES)
= 8V, 100mV/div
REFERENCE VOLTAGE
= 8V, BUF- = BUFOUT,
40
I
REF
4μs/div
(μA)
60
80
MAX1778 toc15
100
A
B
C