ADVANCE INFORMATION All information in this data sheet is preliminary and subject to change. ae? MAXKLAA 1-Cell to 3-Cell, High-Power (1A), Low-Noise, Step-Up DC-DC Converters General Description Tne MAX1700/MAX1701 are high-efficiency, low-noise, step-up DC-DC converters. They are intended for use in battery-powered wireless applications. They use a synchronous-rectifier pulse-width-modulation (PWM) boost topology to generate 2.7V to 5V outputs from bat- tery inputs such as one to three NiCd/NiMH cells or one Li-ion cell. Both devices have an internal 5A, 100mQ N-channel MOSFET switch and a 150mQ P-channel synchronous rectifier. With their internal synchronous rectifier, the MAX1700/ MAX1701 deliver 5% better efficiency than similar non- synchronous converters. They also feature a pulse- frequency-modulation (PFM) standby mode to improve efficiency at light foads and a 5yA shutdown mode. The MAX1700/MAX1701 come in 16-pin QSOP pack- ages (which occupy the same space as an 8-pin SO). The MAX1701 includes two comparators to generate power-good and low-battery warning outputs. It also contains a linear-gain block that can be used to build a linear regulator using an external P-channel pass device. For higher-power outputs, refer to the MAX1703. For dual outputs (step-up and linear regulator), refer to the MAX1705/MAX1706. For an on-board analog-to-digital converter, refer to the MAX848/MAX849. Tne MAX1701EVKIT evaluation kit is available to speed designs. Applications Digital Cordless Phones PCS Phones Wireless Handsets Two-Way Pagers Personal Communicators Palmtop Computers Hand-Held Instruments FRAMAXLIN Features * Up to 96% Efficiency * 1Vin Guaranteed Start-Up 0.8V to 5.5V Input Range @ Up to 800mA Output * Step-Up Output (adjustable from 2.7V to 5.5V) # PWM/PFM Synchronous-Rectified Topology @ External Clock or internal 300kHz Oscillator (guaranteed +14%) # 5yA Logic-Controlled Shutdown @ Power-Good Output (MAX1701) Low-Battery Comparator (MAX1701) # Multi-Use Uncommitted Gain Block (MAX1701) Ordering information PART TEMP.RANGE _PIN-PACKAGE MAX1700C/D OPC to +70C Dice MAX 1 700EEE -40C to +85C 16 QSOP MAX1701C/D OCto+70C Dice MAX1701EEE -40C to +85C 16 QSOP Typical Operating Circuit INPUT B8VTO55V OUTPUT _ = 3.3V OR AD oN = worn UP TO BOGmA OFF ONA OFF a Lon me ot we{CLKISEL = pquT REF OuT FB GND, PGND O.1pF WH HH | f Maxim integrated Products 4-245 For free samples & the latest literature: http:/;www.maxim-ic.com, or phone 1-800-998-8800 For small orders, phone 408-737-7600 ext. 3468. LOZLLXVW/00ZLXVIN MAX1700/MAX1701 1-Cell to 3-Cell, High-Power (1A), Low-Noise, Step-Up DC-DC Converters Pin Configurations TOP VIEW te. [1 ic. [2 net [3 CLE/SEL ty eno [5 | ic. [6] ane [7 ona [a] MAAXLAA MAX1700 6] 1c. iis] Pour 14} our +a] x 12] PGND 14] FB ie ra] ic. Qsop (C. = INTERNAL CONNECTION. DO NGT CONNECT TO THIS PIN, wep [] * ra] 180 Len [2 | +5] Pout ret 3} an axaa [2] 07 cuwse. [4] Maxt701 = [Fs] ux ono [5 | 12) Pano pox [6] - 14) FB one (7 | ria) AN ona [8 BE asop 4-246 FAAXIAA