MAX1889ETE Maxim Integrated Products, MAX1889ETE Datasheet - Page 9

• 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

A
(Circuit of Figure 1, V
otherwise noted.)
B
A: V
B: I
NL
NL
NEGATIVE LINEAR-REGULATOR
LOAD-TRANSIENT RESPONSE
= 0 TO -10mA, 10mA/div
= -7V, 50mV/div, AC-COUPLED
1.250
1.249
1.248
1.247
1.246
1.245
400µs/div
REFERENCE VOLTAGE vs. LOAD CURRENT
0
_______________________________________________________________________________________
IN
10
= +3.3V, V
20 30
MAX1889 toc22
LOAD CURRENT (µA)
Triple-Output TFT LCD Power Supply
40 50
MAIN
-6.95V
-7V
0
-10mA
60 70 80 90 100
= +9V, V
C
D
A
B
OVERCURRENT PROTECTION RESPONSE
A: V
B: V
C: V
D: V
Typical Operating Characteristics (continued)
PL
TO OVERLOAD DURING STARTUP
GATE
MAIN
PL
NL
, 10V/div; I
, 10V/div; I
= +20V, V
, 5V/div
, 5V/div; I
PL
NL
MAIN
= 10mA
= 10mA
20ms/div
= 1.5A
NL
= -7V, SHDN = FREQ = IN, PGND = GND, T
with Fault Protection
MAX1889 toc23
2.4
2.3
2.2
2.1
2.0
2.5
LX CURRENT LIMIT vs. INPUT VOLTAGE
10V
5V
0
5V
0
0
-10V
0
3.0
C
TO OVERLOAD DURING NORMAL OPERATION
D
INPUT VOLTAGE (V)
A
B
3.5
OVERCURRENT PROTECTION RESPONSE
A: V
B: V
C: V
D: V
GATE
MAIN
PL
NL
4.0
= 20V, 10V/div; I
= -7V, 10V/div; I
, 5V/div
= 9V, 5V/div; I
4.5
20ms/div
5.0
MAIN
PL
NL
= 10mA
= 10mA
= 200mA TO 1.5A
5.5
A
= +25°C, unless
MAX1889 toc24
20V
10V
5V
0
5V
0
0
-10V
0
9