SC120ULTRT Semtech, SC120ULTRT Datasheet
SC120ULTRT
Specifications of SC120ULTRT
Related parts for SC120ULTRT
SC120ULTRT Summary of contents
Page 1
... MLPD-UT-6, 1.5×2.0×0.6 (mm) package, or low cost SOT23-6 package, make this device an excellent choice for small handheld applications that require the longest possible battery life OUT EN GND SC120 © 2010 Semtech Corporation SC120 Low Voltage Synchronous Boost Regulator 3.3V C OUT 1 ...
Page 2
... Marking Information — SOT23 Top View CP00 Bottom View yyww SOT23, 6 LEAD yyww = date code Ordering Information Device OUT SC120ULTRT 4 SC120SKTRT SC120EVB SC120SKEVB Notes: (1) Available in tape and reel only. A reel contains 3,000 devices. (2) Lead-free packaging, only. Device is WEEE and RoHS compliant, and halogen-free. 3 Pin Confi guration — ...
Page 3
Absolute Maximum Ratings IN, OUT, LX -0.3 to +6 ...
Page 4
Electrical Characteristics (continued) Parameter P-Channel ON Resistance N-Channel ON Resistance N-Channel Current Limit P-Channel Startup Current Limit LX Leakage Current PMOS LX Leakage Current NMOS Logic Input High Logic Input Low Logic Input Current High Logic Input Current Low NOTES: ...
Page 5
Typical Characteristics — V Effi ciency vs. I OUT = 499k Ω Ω 4.7 μ 100 0.8V ...
Page 6
Typical Characteristics — V Temperature Regulation — PSAVE Mode (V = 499k Ω Ω 4.7 μ 5mA 1 2 OUT 1. 1. 0.8V ...
Page 7
Typical Characteristics — V Effi ciency vs. I OUT ο FB grounded 4.7 μ 100 ...
Page 8
Typical Characteristics — V Temperature Regulation — PSAVE Mode (V FB grounded 4.7 μ 5mA OUT 3 3. 1.0V 3.32 IN 3.28 3.24 3.2 -50 - Junction ...
Page 9
Typical Characteristics — V Effi ciency vs. I OUT = 931k Ω 402k Ω 4.7 μ 100 1.2V IN ...
Page 10
Typical Characteristics — V Temperature Regulation — PSAVE Mode (V = 931k Ω 402k Ω 4.7 μ 4 3. ...
Page 11
Typical Characteristics — V Effi ciency vs. I OUT = 931k Ω 294k Ω 3.3 μ 100 1. 0.8V IN ...
Page 12
Typical Characteristics — V Temperature Regulation — PSAVE Mode (V = 931k Ω 294k Ω 3.3 μ 5 1. 0. ...
Page 13
Typical Characteristics — V Effi ciency vs OUT = 931k Ω 294k Ω 4.7 μ 100 1.6V ...
Page 14
Typical Characteristics — V Temperature Regulation — PSAVE Mode (V = 931k Ω 294k Ω 4.7 μ 5 1. ...
Page 15
Typical Characteristics — V Effi ciency vs OUT = 931k Ω 294k Ω 6.8 μ 100 3.0V IN ...
Page 16
Typical Characteristics — V Temperature Regulation — PSAVE Mode (V = 931k Ω 294k Ω 6.8 μ 5 4. ...
Page 17
Typical Characteristics (continued) Load Transient (PSAVE to PWM 3.3V 1.2V 25°C OUT 5mA to OUT 100mA (50mA/div) V OUT (100mV/div) AC Coupled Time = (100μs/div) PSAVE Operation V = 3.3V, ...
Page 18
Pin Descriptions MLPD Pin # SOT23 Pin # Pin Name Thermal T NA Pin Function LX Switching node — connect an inductor from the input supply to this ...
Page 19
Block Diagram IN EN Oscillator and Slope Generator Output Voltage FB Selection Logic V OUT Comp Start-up Oscillator Slope Comp. PWM Comp. + PWM Control - Error Amp REF + - 1.2 V ...
Page 20
Applications Information Detailed Description The SC120 is a synchronous step-up Pulse Width Modulated (PWM) DC-DC converter utilizing a 1.2MHz fi xed frequency current mode architecture designed to provide output voltages in the range 1.8V to 5.0V from an ...
Page 21
Applications Information (continued) PWM Operation The PWM cycle runs xed frequency (f with a variable duty cycle (D). PWM operation continually draws current from the input supply (except for discon- tinuous mode, described subsequently). During the on- ...
Page 22
Applications Information (continued) BURST +1.8% +0.8% V OUT Prog’d Voltage -2% Inductor Current 240mA 0A Figure 2 — PSAVE Operation With Exit to PWM Due To Output Voltage Decay BURST +1.8% +0.8% V OUT Prog’d Voltage -2% Inductor Current 240mA ...
Page 23
Applications Information (continued) accumulates with each successive cycle in the burst. The result is that the output load current that can be sup- ported in PSAVE under this high V greater than occurs if the 240mA current limit can be ...
Page 24
Applications Information (continued) pause at a reduced output voltage until the load is reduced further. Output Overload and Recovery When in PSAVE operation, an increasing load will eventu- ally satisfy one of the PSAVE exit criteria and regulation will revert ...
Page 25
Applications Information (continued This is the change in I during the on-state. During the L off -state, again neglecting the p-channel FET R the inductor ...
Page 26
Applications Information (continued) formance), will ensure correct mode–switching behavior. For very low V (0.7V to 0.8V) such as is obtained with a IN nearly-depleted single-cell alkaline battery), a smaller value of inductance will help to ensure that PWM mode will ...
Page 27
Applications Information (continued 7.0mm C LX SC120 GND Figure 4 — Layout Drawing for MLP package 8mm SC120 GND LX C Figure 5 — Layout Drawing ...
Page 28
Outline Drawing — MLPD-UT-6 1.5x2 A PIN 1 INDICATOR (LASER MARK) A aaa LxN N NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. COPLANARITY APPLIES TO THE EXPOSED PAD AS WELL AS TERMINALS. B ...
Page 29
Land Pattern — MLPD-UT-6 1.5x2 NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ...
Page 30
Outline Drawing — SOT23 E/2 1 ccc C 2X N/2 TIPS B aaa C SEATING PLANE C bxN bbb C A-B D SIDE VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS -A- ...
Page 31
Land Pattern — SOT23-6 X (C) P NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. DIMENSIONS DIM ...
Page 32
... IN SUCH APPLICATIONS IS UNDERSTOOD TO BE UNDERTAKEN SOLELY AT THE CUSTOMER’S OWN RISK. Should a customer purchase or use Semtech products for any such unauthorized application, the customer shall indemnify and hold Semtech and its offi cers, employees, subsidiaries, affi liates, and distributors harmless against all claims, costs damages and attorney fees which could arise. ...