SC310 High-Side Current-Sense Amplifier with Low Impedance Voltage Output POWER MANAGEMENT Description Features The SC310 is a high-side current sense amplifier ideal for Three gain versions (20V/V, 50V/V, 100V/V) any application where precision current monitoring is available needed. Possible uses include battery-powered products 2.7V to 25V input common mode range such as cellphones and notebooks, as well as industrial 3V to 25V supply voltage range and data acquisition applications. The wide 2.7V to 25V 270 A supply current common mode input range is independent of supply range, 1% typical accuracy providing complete flexibility in battery sensing applica- Buffered low impedance voltage output tions. Industrial temperature range (-40C to +125C) Small, lead-free SOT23-6 Package The Current-Sense Amplifier offers three gain versions, SC310A (gain 20 V/V), SC310B (gain 50 V/V) and SC310C (gain 100 V/V). An external shutdown pin (SHDN) enables turn off for the IC. A buffered output with low impedance renders the overall gain immune to Applications load resistance. Output range is from 0V to Vcc - 1.7V. Notebook and Tablet PCs Data Acquisition Other features include tiny SOT-23-6 packaging, very low Battery Packs supply current, and wide supply voltage range (3V to 25V). Charging Applications The SC310 is rated for operation over the Industrial Tem- Industrial and Embedded Applications perature range (-40C to +125C). Typical Application Circuit R SENSE I LOAD 2.7V to 25V Load/ Battery 3V - 25V V OUT OUT VCC 0.1uF 0.1uF June 4, 2007 www.semtech.com 1 SHDN CS+ CS- GNDSC310 POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Parameter Symbol Min Max Units Supply Voltage VCC -0.3 28 V Differential Input Voltage V - V 0.5 V CS+ CS- Thermal Resistance Junction 230 C/W JA Thermal Resistance Junction to Case 81 C/W JC Operating Temperature Range T -40 +125 C A Storage Temperature Range T -65 +150 C STG Junction Temperature Range T -65 +150 C J Lead Temperature (Soldering) 10s TLEAD 260 C CS+ Voltage V -0.3 VCC + 0.3 V CS+ CS- Voltage V -0.3 VCC + 0.3 V CS- SHDN Voltage V -0.3 VCC + 0.3 V SHDN ESD Rating (Human Body Model) V 2 kV ESD Electrical Characteristics V = 2.7V to 25V, V = 3V to 25V, V = 0, T = T = -40C to +125C , unless otherwise specified CS+ CC SENSE A J PrPPPlPraaaaarrrrraaaaammmmmeeeeettttteeeeerrr SlSSSsSlyyyyymmmmmbbbbboooooll CsCCCnCsooooonnnnndddddiiiiitttttiiiiiooooonnnnnss MMnMMpMniiiiinn TTpTTpTxyyyyypp MMxMMxMsaaaaaxx UUUsUsUnnnnniiiiitttttss OVperating Voltage Range 352V CC CVommon-Mode Input Range 0C T +7125C25. 2V CMR A -40C T<30C 25 A CRommon-Mode RejectionC0M 9Bd SIupply Current V > 2.7V, V=712V 01.2 mA CC CS+ CC IInput Bias Current V>0+2.7V 1A5 CS+ CS+ I V>0+2.7V 1 CS- CS+ FVull-Scale Sense Voltage V = V - V 1V50 m SENSE SENSE CS+ CS- TVotal OUT Voltage Error = +100mV, V = 12V, 154%.2 SENSE CC V = 12V, -40C T 85C CS+ A V = +100mV, V = 12V, 154. SENSE CC V = 12V, T = 125C CS+ A V = +100mV, V = 12V, 153.2 SENSE CC V = +12V, T = +25 CS+ A V = +100mV, V = 25V, 154. SENSE CC V = 25V, -40C T 85C CS+ A 2005 Semtech Corp. www.semtech.com 2