MAX1889ETE Maxim Integrated Products, MAX1889ETE Datasheet - Page 7

• Manufacturer Part Number: MAX1889ETE
• Description: DC/DC Switching Converters
• Manufacturer: Maxim Integrated Products

Specifications of MAX1889ETE

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

(Circuit of Figure 1, V
otherwise noted.)
A
C
B
D
A
B
C
D
A: V
B: V
C: V
D: V
A: V
B: V
C: V
D: V
SHDN
MAIN
PL
NL
IN
MAIN
PL
NL
, 5V/div
= 20V, 10V/div
POWER-UP SEQUENCE FROM
SLOW-RISING INPUT SUPPLY
= -7V, 10V/div
= 20V, 10V/div
= -7V, 10V/div
, 5V/div
= 9V, 5V/div
= 9V, 5V/div
POWER-UP SEQUENCE
USING SHDN CONTROL
2ms/div
2ms/div
_______________________________________________________________________________________
IN
= +3.3V, V
MAX1889 toc13
MAX1889 toc10
Triple-Output TFT LCD Power Supply
MAIN
5V
0
5V
0
20V
10V
0
0
-10V
5V
0
5V
0
20V
10V
0
0
-10V
= +9V, V
A
C
A
C
B
B
D
STEP-UP REGULATOR NORMAL OPERATION
A: V
B: V
C: INDUCTOR CURRENT, 500mA/div
A: V
B: V
C: V
D: V
(10mA LOAD) USING SHDN CONTROL
STEP-UP REGULATOR SOFT-START
Typical Operating Characteristics (continued)
LX
MAIN
SHDN
GATE
C2
MAIN
PL
, 5V/div
, 5V/div
, 5V/div
, 5V/div
= 9V, 50mV/div, AC-COUPLED
= 9V, 5V/div
= +20V, V
(200mA LOAD)
1ms/div
1µs/div
NL
= -7V, SHDN = FREQ = IN, PGND = GND, T
MAX1889 toc14
MAX1889 toc11
with Fault Protection
10V
5V
0
9.05V
9V
1A
0
5V
0
5V
0
5V
0
10V
500mA
5V
0
26.2
26.0
25.8
25.6
25.4
25.2
25.0
A
C
B
D
0.1
A: V
B: V
C: V
D: V
(200mA LOAD) USING SHDN CONTROL
OUTPUT VOLTAGE vs. LOAD CURRENT
STEP-UP REGULATOR SOFT-START
V
I
MAIN
IN
SHDN
GATE
C2
MAIN
= 3.3V
, 5V/div
= 200mA
, 5V/div
, 5V/div
POSITIVE CHARGE-PUMP
= 9V, 5V/div
LOAD CURRENT (mA)
1ms/div
1
A
= +25°C, unless
MAX1889 toc12
10
5V
0
5V
0
5V
0
10V
5V
0
7