ver: 0.4 oct 25, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 1 G973 global mixed-mode technology 4a low dropout regulator with enable features ? adjustable output low to 0.8v ? 330mv dropout @ 4a, vo 1.2v ? over current and over temperature protection ? enable pin ? low reverse leakage (output to input ) ? power sop-8 (fd) packages with thermal pad ? 2% output voltage ? vo power ok signal ? 1.2v options by setting adj pin below 0.2v and adjustable externally using resistors ? vo pull low resistance when disable ? vo soft start when enable applications ? motherboards ? peripheral cards ? network cards ? set top boxes ? notebook computers general description the G973 is a high performance positive voltage regulator designed for use in applications requiring very low input voltage and very low dropout voltage at up to 4 amps. it operates with vpp voltage 5v and output voltage programmable as low as 0.8v. the G973 features ultra low dropout, ideal for applications where v out is very close to v in . additionally, the G973 has an enable pin to further reduce power dissipation while shutdown. the G973 provides excellent regula- tion over variations in line, load and temperature. the G973 provides a power ok signal to indicate if the voltage level of vo reaches 92% of its rating value. the G973 is available in the power sop-8 (fd) pack- age. it is available with 1.2v internally preset outputs that are also adjustable using external resistors. ordering information order number marking temp. range package (green) G973-120adjf11u 973-120 -40 c~+85 c sop-8 (fd) note: f1: sop-8 (fd) 1: bonding code u : tape & reel e.g. 120 denotes the 1.20v output voltage pin configuration typical application circuit vin vo r1 r2 ven vin vo adj gnd G973 0.8 (r1+r2) 1. vo = r2 volts, c in 20 f c o 20 f r2<120k is recommended vpp vpp (5v) vo 8 6 5 1 2 3 4 gnd adj vo top view sop-8 (fd) G973 7 ven pok vpp vin pok vin 10k c pp 1 f thermal pad * thermal pad can be connected to vin ** connect thermal pad to ground plate will have better thermal performance c 1 (optional) 2. c 1 is not necessary. vo is also stable if c 1 = 22pf~150pf vin vo r1 r2 ven vin vo adj gnd G973 0.8 (r1+r2) 1. vo = r2 volts, c in 20 f c o 20 f r2<120k is recommended vpp vpp (5v) vo 8 6 5 1 2 3 4 gnd adj vo top view sop-8 (fd) G973 7 ven pok vpp vin pok vin 10k c pp 1 f thermal pad * thermal pad can be connected to vin ** connect thermal pad to ground plate will have better thermal performance c 1 (optional) 2. c 1 is not necessary. vo is also stable if c 1 = 22pf~150pf
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