Rainbow Electronics MAX1664 - Manual (Page 7)

MAX1664
Active-Matrix Liquid Crystal Display
(AMLCD) Supply
_______________________________________________________________________________________ 7
PLL Compensation. Connect compensation network as in Figure 4. PLLC 9
Backplane Driver Negative Supply. Typically connected to PGND1. May be connected to a separate supply. BPV SS 10
Backplane Driver Output BPDRV 11
Backplane Driver Positive Supply. Typically connected to V OUT1 of DC-DC 1. May be connected to a
separate supply.
BPV DD 12
Backplane Driver Clock Input. See Table 1 for input frequency ranges. BPCLK 13
Analog Ground. Connect to PGND1 and PGND2. See Supply Connections and Layout section. GND 5
Supply Input to the IC. The input voltage range is +2.8V to +5.5V. IN 6
Regulator Feedback Input for Negative Output, DC-DC 2. Regulates to 0V nominal. FB2- 7
Regulator Feedback Input for Positive Output, DC-DC 2. Regulates to 1.25V nominal. FB2+ 8
Internal Reference Output. Connect a 0.22µF capacitor from this pin to GND. REF can source up to 50µA. REF 4
Regulator Feedback Input, DC-DC 1. Regulates to 1.25V nominal. FB1 3
PIN
Ready Indicator Output, DC-DC 1 and DC-DC 2. Open-drain N-channel output becomes high impedance
when all three outputs are within 10% of regulation.
RDY 2
Shutdown Input. Drive low to enter shutdown mode. Drive high or connect to IN for normal operation. All IC
sections are off when SHDN is low.
SHDN 1
FUNCTION NAME
Power Ground 1. Connect to PGND2. Source of internal LX1 N-channel MOSFET. PGND1 18
Drain of Internal LX1 N-Channel MOSFET LX1 19
Sets the BPCLK input frequency range for PLL synchronization. Connect to GND, REF, or IN. See Table 1. FPLL 20
DC-DC 2 Power Input. Source of Internal LX2P P-channel MOSFET. INP 14
Drain of Internal LX2P P-Channel MOSFET LX2P 15
Drain of Internal LX2N N-Channel MOSFET LX2N 16
Power Ground 2. Connect to PGND1. Source of internal LX2N N-channel MOSFET. PGND2 17
______________________________________________________________Pin Description