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LTC2908CDDB-C1-TRMPBF Datasheet(PDF) 7 Page - Linear Technology |
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LTC2908CDDB-C1-TRMPBF Datasheet(HTML) 7 Page - Linear Technology |
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7 / 16 page  LTC2908 7 2908fc TYPICAL PERFORMANCE CHARACTERISTICS Specifications are at TA = 25°C unless otherwise noted. PIN FUNCTIONS OUTPUT SOURCE CURRENT, IRST (μA) 0 3 4 –16 2908 G21 2 1 –4 –8 –12 –20 85°C –40°C 5 25°C V1 = 5.0V V2 = 3.3V V3 = 2.5V V4 = 1.8V VADJ1 = VADJ2 = 0.55V SUPPLY VOLTAGE, VCC (V) 1.5 –20 –25 –30 34 2908 G20 –15 –10 2 2.5 3.5 4.5 5 –5 0 VRT25 LTC2908-C1 VRT50 LTC2908-A1 VRT33 LTC2908-B1 VCC = V1 = V2 (A1/B1), VCC = V1(C1) V3 = 2.5V (A1)/V3 = 1.8V (B1) V4 = 1.8V (A1)/V4 = 1.5V (B1) VADJ1 = VADJ2 = 0.55V (A1/B1) VADJ1 = VADJ2 = VADJ3 = VADJ4 = VADJ5 = 0.55V(C1) RST HELD AT 0V RST Pull-Up Current vs Supply Voltage RST Output Voltage High vs RST Output Source Current LTC2908-A1 OUTPUT SOURCE CURRENT, IRST (μA) 0 0.5 1.0 1.5 2.0 –1 –2 –3 –4 2908 G24 –5 –6 –7 –8 25°C 85°C V1 = 2.5V VADJ1 = VADJ2 = VADJ3 = VADJ4 = VADJ5 = 0.55V –40°C OUTPUT SOURCE CURRENT, IRST (μA) 0 0.5 1.0 1.5 2.0 2.5 3.0 –2 –4 –6 –8 2908 G22 –10 –12 85°C –40°C 25°C V1 = 3.3V V2 = 2.5V V3 = 1.8V V4 = 1.5V VADJ1 = VADJ2 = 0.55V RST Output Voltage High vs RST Output Source Current LTC2908-B1 RST Output Voltage High vs RST Output Source Current LTC2908-C1 V2 (Pin 1/Pin 4): Voltage Input 2. The greater of V1, V2 is also the internal VCC. The operating voltage on this pin shall not exceed 6V. When in normal operation (V1 > V2), this pin draws approximately 8μA. When this pin is acting as the VCC (V2 > V1), this pin draws an additional 16μA. Bypass this pin to ground with a 0.1μF (or greater) capacitor. V4 (Pin 2/Pin 3): Voltage Input 4. RST (Pin 3/Pin 2): Reset Logic Output. Pulls low when any voltage input is below the reset threshold and is held low for 200ms after all voltage inputs are above threshold. This pin has a weak pull-up to VCC and may be pulled above VCC using an external pull-up. GND (Pin 4/Pin 1): Device Ground. (TS8 Package/DDB8 Package) LTC2908-A1/LTC2908-B1 VADJ2(Pin5/Pin8):AdjustableVoltageInput2.SeeTable 1 for recommended ADJ resistors values. V3 (Pin 6/Pin 7): Voltage Input 3. VADJ1 (Pin7/Pin6): Adjustable Voltage Input 1. See Table 1 for recommended ADJ resistors values. V1 (Pin 8/Pin 5): Voltage Input 1. The greater of V1, V2 is also the internal VCC. The operating voltage on this pin shall not exceed 6V. When in normal operation (V1 > V2), this pin draws approximately 26 μA. When this pin is not acting as the VCC(V2>V1),thispindrawsapproximately8μA.Bypass this pin to ground with a 0.1μF (or greater) capacitor. Exposed Pad (Pin 9, DDB8 Only): Exposed Pad may be left open or connected to device ground. |
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Similar Description - LTC2908CDDB-C1-TRMPBF |
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