Rainbow Electronics MAX8712 - Manual (Page 8)

MAX8710/MAX8711/MAX8712
Low-Cost Linear-Regulator
LCD Panel Power Supplies
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(Circuit of Figure 1. V
IN
= V
INL
= V
SUPCP
= 12V, V
OUTL
= V
SUPB
= 10V, V
SRC
= 10V, T
A
= 0°C to +85°C. Typical values are at T
A
=
+25°C, unless otherwise noted.)
SWITCH CONTROL FUNCTION (MODE 2)
MAX8710/11/12 toc13
20µs/div
A
0V
0V
C
B
0V
A: V
GON
, 10V/div
B: V MODE , 5V/div
C: V CTL , 5V/div
C GON = 1.5nF
REFERENCE LOAD REGULATION
MAX8710/11/12 toc14
REF LOAD CURRENT (mA)
REF VOLTAGE ERROR (%)
0.8 0.6 0.4 0.2
-0.08
-0.06
-0.04
-0.02
0
-0.10
0 1.0
REFERENCE vs. TEMPERATURE
MAX8710/11/12 toc15
TEMPERATURE (°C)
REF VOLTAGE ERROR (%)
80 60 40 20 0 -20
-0.4
-0.2
0
0.2
-0.6
-40 100
SUPB SUPPLY CURRENT
vs. SUPB VOLTAGE
MAX8710/11/12 toc16
SUPB VOLTAGE (V)
SUPB SUPPLY CURRENT (mA)
12 10 8 6
0.2
0.4
0.6
0.8
1.0
0
4 14
BUFFER CONFIGURATION
V
OUTB = 0.5 x V POSB
OPERATIONAL-AMPLIFIER SMALL-SIGNAL
STEP RESPONSE (BUFFER CONFIGURATION)
MAX8710/11/12 toc17
400ns/div
A
B
0V
0V
A: V POSB , 50mV/div, AC-COUPLED
B: V OUTB , 50mV/div, AC-COUPLED
OPERATIONAL-AMPLIFIER LARGE-SIGNAL
STEP RESPONSE (BUFFER CONFIGURATION)
MAX8710/11/12 toc18
400ns/div
A
B
0V
0V
A: V POSB , 5V/div
B: V OUTB , 5V/div
OPERATIONAL-AMPLIFIER LOAD-TRANSIENT
RESPONSE (BUFFER CONFIGURATION)
MAX8710/11/12 toc19
1µs/div
A
B
0mA
5V
A: V OUTB , 2V/div
B: I
OUTB
, 50mA/div
OPERATIONAL-AMPLIFIER
RAIL-TO-RAIL I/O
MAX8710/11/12 toc20
40µs/div
A
B
0V
0V
A: V POSB , 5V/div
B: V
OUTB
, 5V/div