Rainbow Electronics MAX8712 - Manual (Page 3)

MAX8710/MAX8711/MAX8712
Low-Cost Linear-Regulator
LCD Panel Power Supplies
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ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. V IN = V INL = V SUPCP = 12V, V OUTL = V SUPB = 10V, V SRC = 27V, T A = 0°C to +85°C. Typical values are at T
A =
+25°C, unless otherwise noted.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Common-Mode Input Range V NEGB , V POSB 0 V SUPB V
Common-Mode Rejection Ratio 0
≤
(V NEGB , V POSB ) < V SUPB 50 90 dB
Open-Loop Gain 125 dB
I OUTB = 100µA
V
SUPB
-
15
V
SUPB
- 2
Output Voltage Swing High
I OUTB = 5mA
V SUPB -
150
V SUPB
- 80
mV
I OUTB = -100µA 2 15
Output Voltage Swing Low
I OUTB = -5mA 80 150
mV
Short to V
SUPB
/ 2, sourcing 50 150
Short-Circuit Current
Short to V SUPB / 2, sinking 50 140
mA
Output Current
Buffer configuration, V POSB = 4V,
V OUTB error <
±
10mV
±40 mA
Power-Supply Rejection Ratio 6V
≤
V SUPB
≤
13.2V, DC (V NEGB , V POSB ) = V SUPB / 2 60 100 dB
Slew Rate 12 V/µs
-3dB Bandwidth Buffer configuration, R L = 10k
Ω
, C L = 10pF 12 MHz
Gain-Bandwidth Product Buffer configuration, R L = 10k
Ω
, C L = 10pF 8 MHz
POSITIVE CHARGE-PUMP REGULATOR
FBP Regulation Voltage I GON = 10mA 2.425 2.500 2.575 V
FBP Line-Regulation Error
V OUTL (V SUPCP , MAX8710) = 10.8V~13.2V,
V GON = 27V, I GON = 20mA
25 mV
FBP Input Bias Current V
FBP
= 2.5V -50 +50 nA
DRVP P-Channel On-Resistance 15 30 Ω
V FBP = 2.4V 6 12
Ω
DRVP N-Channel On-Resistance
V FBP = 2.6V 20 k Ω
FBP Fault Trip Level Falling edge 1.92 2.00 2.08 V
Positive Charge-Pump Soft-Start
Period
2 12 oscillator clock cycles in a 7-bit DAC 2.73 ms
NEGATIVE CHARGE-PUMP REGULATOR
FBN Regulation Voltage I GOFF = 10mA 200 250 300 mV
FBN Input Bias Current V FBN = 250mV -50 +50 nA
FBN Line Regulation
V OUTL (V SUPCP , MAX8710) = 10.8V~13.2V,
V VGOFF = -6V, I GOFF = -50mA
25 mV
DRVN P-Channel On-Resistance 7.5 15
Ω
V FBN = 350mV 3 6 Ω
DRVN N-Channel On-Resistance
V FBN = 150mV 20 k
Ω
FBN Fault Trip Level Rising edge 700 mV
Negative Charge-Pump Soft-Start
Period
2 12 oscillator clock cycles in a 7-bit DAC 2.73 ms