alpha industries, inc. [781] 935-5150 ? fax [617] 824-4579 ? email sales@alphaind.com ? www.alphaind.com 1 specifications subject to change without notice. 2/01a AM101-73 preliminary dc/dc converter features converts a positive voltage into a negative voltage ideal for providing gate voltage bias for gaas products ultra small sot-6 package only three capacitors required as additional components high oscillating frequency (600 khz) enables the use of low cost ceramic components description the AM101-73 is a low cost, switched capacitor voltage converter. this cmos based converter operates at a relatively high frequency, permitting the use of low cost ceramic capacitors. at supply voltages up to 3.1 v, the inverted output follows the input voltage, and from 3.1?5.5 v, the output regulates to -3.1 v. applications include voltage conversion for fet/phemt power amplifier control circuits, fet/phemt switch control, and various other portable, mobile and wireless systems characteristic value supply voltage 7 v output short circuit duration 10 sec. operating temperature -40 to +100c storage temperature -65 to +150c absolute maximum ratings operating characteristics at 25c parameter 1 condition frequency min. typ. max. unit supply voltage (v gen ) 2.5 6 v supply current (i gen )v gen = 3.5 v 350 a output voltage (v ss )v gen = 3.5 v -3.1 v i load = 0.5 ma oscillation frequency (f osc ) 600 khz output impedance (r o ) 50 ? current efficiency 80 % voltage conversion efficiency v gen = 3.5 v 95 % i load = 0.0 ma sot-6 0.074 (1.90 mm ref.) 0.071 (1.80 mm) 0.052 (1.30 mm) 0.037 (0.95 mm) ref. 0.122 (3.10 mm) 0.106 (2.70 mm) 0.006 (0.15 mm) 0.000 (0.00 mm) 0.057 (1.45 mm) 0.035 (0.90 mm) 0.020 (0.51 mm) 0.014 (0.350 mm) 0.126 (3.20 mm) 0.087 (2.20 mm) pin 6 pin 1 pin 1 indicator 0.022 (0.61 mm) 0.004 (0.10 mm) 0.014 (0.26 mm) 0.004 (0.10 mm) 0.012 (0.30 mm) typ. 5.0? ?1? 5.0? ?1? 1. all measurements made in a 50 ? system, unless otherwise specified.
pin symbol function 1 gnd connect to ground. 2v ssout negative output voltage. a 10?2 nf capacitor required. 3v enable charge pump enable input. when set to v gen , negative voltage generated, and when set to 0 v, negative voltage output is disabled. 4v gen positive input voltage. a 10?2 nf capacitor required. 5c a charge pump capacitor pin a. a 10?2 nf capacitor required from pin 5 to pin 6. 6c b charge pump capacitor pin b. a 10?2 nf capacitor required from pin 6 to pin 5. dc/dc converter AM101-73 2 alpha industries, inc. [781] 935-5150 ? fax [617] 824-4579 ? email sales@alphaind.com ? www.alphaind.com specifications subject to change without notice. 2/01a pin out pin configuration 123 65 4 gnd v ssout v enable c b c a v gen supply current vs. supply voltage and current load supply current (ma) supply voltage (v) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 0 ma 0.2 ma 0.4 ma 0.6 ma 0.8 ma 1.0 ma output voltage vs. supply voltage and current load output voltage (v) supply voltage (v) 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 -4.5 -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0 ma 0.2 ma 0.4 ma 0.6 ma 0.8 ma 1.0 ma output voltage vs. supply voltage and current load v gen = 3.5 output voltage (v) load current (ma) -4.0 -3.5 -3.0 -2.5 -2.0 -1.5 -1.0 -0.5 0 0 0.2 0.4 0.6 0.8 1.0 typical performance data
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