LTC2913CMS-1#PBF

LTC2913 Dual UV/OV Voltage Monitor FEATURES DESCRIPTION n The LTC®2913 is a dual input voltage monitor intended for multiple voltages in a variety of applications. Dual inputs for each voltage allow monitoring two separate undervoltage (UV) conditions and two separate overvoltage (OV) conditions. All monitors share a common undervoltage output and a common overvoltage output. The LTC2913-1 has latching capability for the overvoltage output. The LTC2913-2 has functionality to disable both the overvoltage and undervoltage outputs. n n n n n n n n Monitors Two Voltages Simultaneously Adjustable UV and OV Trip Values Guaranteed Threshold Accuracy: ±1.5% Input Glitch Rejection Adjustable Reset Timeout with Disable 44μA Quiescent Current Open-Drain OV and UV Outputs Guaranteed OV and UV for VCC ≥ 1V Available in 10-Lead MSOP and (3mm × 3mm) DFN Packages APPLICATIONS n n n Glitch filtering ensures reliable reset operation without false or noisy triggering. The LTC2913 provides a precise, versatile, space-conscious, micropower solution for voltage monitoring. Desktop and Notebook Computers Network Servers Core, I/O Voltage Monitors L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Dual OV/UV Supply Monitor Typical Transient Duration vs Comparator Overdrive 5V POWER 3.3V SUPPLIES 0.1μF 44.2k 1k 27.4k VCC VH1 LTC2913-1 VL1 VH2 4.53k SYSTEM OV UV 1k 4.53k VL2 GND LATCH TMR 2913 TA01a 22nF TIMEOUT = 200ms TYPICAL TRANSIENT DURATION (μs) 700 600 500 RESET OCCURS ABOVE CURVE 400 300 200 VCC = 6V 100 VCC = 2.3V 0 0.1 1 10 100 COMPARATOR OVERDRIVE PAST THRESHOLD (%) 2913 TA01b 2913fb 1 LTC2913 ABSOLUTE MAXIMUM RATINGS (Notes 1, 2) Terminal Voltages VCC (Note 3)............................................. –0.3V to 6V OV, UV ................................................... –0.3V to 16V TMR ..........................................–0.3V to (VCC + 0.3V) VHn, VLn, LATCH, DIS .......................... –0.3V to 7.5V Terminal Currents IVCC ..................................................................+10mA IUV, IOV...............................................................10mA Operating Temperature Range LTC2913C ................................................ 0°C to 70°C LTC2913I.............................................. –40°C to 85°C LTC2913H .......................................... –40°C to 125°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) MSOP ............................................................... 300°C PACKAGE/ORDER INFORMATION TOP VIEW TOP VIEW 10 9 8 7 6 1 2 3 4 5 VH1 VL1 VH2 VL2 GND VCC TMR LATCH UV OV MS PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 120°C/W 10 VCC VH1 1 VL1 2 VH2 3 VL2 4 7 UV GND 5 6 OV 9 TMR 11 8 LATCH DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 43°C/W EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL ORDER PART NUMBER MS PART MARKING* ORDER PART NUMBER DD PART MARKING* LTC2913CMS-1 LTC2913IMS-1 LTC2913HMS-1 LTCKK LTCKK LTCKK LTC2913CDD-1 LTC2913IDD-1 LTC2913HDD-1 LCKN LCKN LCKN TOP VIEW TOP VIEW VH1 VL1 VH2 VL2 GND 1 2 3 4 5 10 9 8 7 6 VCC TMR DIS UV OV MS PACKAGE 10-LEAD PLASTIC MSOP TJMAX = 150°C, θJA = 120°C/W 10 VCC VH1 1 VL1 2 VH2 3 VL2 4 7 UV GND 5 6 OV 9 TMR 11 8 DIS DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 43°C/W EXPOSED PAD (PIN 11) PCB GND CONNECTION OPTIONAL ORDER PART NUMBER MS PART MARKING* ORDER PART NUMBER DD PART MARKING* LTC2913CMS-2 LTC2913IMS-2 LTC2913HMS-2 LTCKM LTCKM LTCKM LTC2913CDD-2 LTC2913IDD-2 LTC2913HDD-2 LCKP LCKP LCKP Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: http://www.linear.com/leadfree/ *The temperature grade is identified by a label on the shipping container. 2913fb 2 LTC2913 ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, VLn = 0.45V, VHn = 0.55V, LATCH = VCC, DIS = Open unless otherwise noted. (Note 2) SYMBOL VSHUNT ΔVSHUNT PARAMETER VCC Shunt Regulator Voltage VCC Shunt Regulator Load Regulation CONDITIONS MIN TYP MAX ICC = 5mA l 6.2 6.6 6.9 V –40ºC < TA < 125ºC l 6.2 6.6 7.0 V ICC = 2mA to 10mA l 200 300 mV l VCC Supply Voltage (Note 3) VCCR(MIN) Minimum VCC Output Valid DIS = 0V l VCC(UVLO) Supply Undervoltage Lockout DIS = 0V, VCC Rising l 1.9 ΔVCC(UVHYST) Supply Undervoltage Lockout Hysteresis DIS = 0V l 5 ICC Supply Current VCC = 2.3V to 6V l VUOT Undervoltage/Overvoltage Threshold tUOD Undervoltage/Overvoltage Threshold to Output Delay IVHL VHn, VLn Input Current tUOTO UV/OV Time-Out Period V 1 V 2 2.1 V 25 50 mV 44 80 μA 492 500 508 mV l 50 125 500 μs l ±15 nA –40ºC < TA < 125ºC l ±30 nA CTMR = 1nF l 6 8.5 12.5 mS –40ºC < TA < 125ºC l 6 8.5 14 mS 1.2 VHn = VUOT – 5mV or VLn = VUOT + 5mV OV Latch Clear Input High l VLATCH(VIL) OV Latch Clear Input Low l l ILATCH LATCH Input Current VDIS(VIH) DIS Input High l VDIS(VIL) DIS Input Low l IDIS DIS Input Current ITMR(UP) TMR Pull-Up Current TMR Pull-Down Current VSHUNT l VLATCH(VIH) ITMR(DOWN) 2.3 UNITS VLATCH > 0.5V V 0.8 V ±1 μA 1.2 V 0.8 V VDIS > 0.5V l 1 2 3 μA VTMR = 0V l –1.3 –2.1 –2.8 μA –40ºC < TA < 125ºC l –1.2 –2.1 –2.8 μA VTMR = 1.6V l 1.3 2.1 2.8 μA 2.8 –40ºC < TA < 125ºC l 1.2 2.1 VTMR(DIS) Timer Disable Voltage Referenced to VCC l –180 –270 VOH Output Voltage High UV/OV VCC = 2.3V, IUV/OV = –1μA l 1 VOL Output Voltage Low UV/OV VCC = 2.3V, IUV/OV = 2.5mA VCC = 1V, IUV = 100μA l l Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All currents into pins are positive; all voltages are referenced to GND unless otherwise noted. μA mV V 0.1 0.01 0.3 0.15 V V Note 3: VCC maximum pin voltage is limited by input current. Since the VCC pin has an internal 6.5V shunt regulator, a low impedance supply that exceeds 6V may exceed the rated terminal current. Operation from higher voltage supplies requires a series dropping resistor. See Applications Information. 2913fb 3 LTC2913 TIMING DIAGRAMS VLn Monitor Timing VHn Monitor Timing VUOT VHn tUOD UV tUOTO tUOD 1V OV 2913 TD01 UV 1V VLn Monitor Timing (TMR Pin Strapped to VCC) VUOT VUOT VLn tUOD tUOTO 2913 TD02 VHn Monitor Timing (TMR Pin Strapped to VCC) VHn VUOT VLn tUOD tUOD OV 1V tUOD 1V 2913 TD03 2913 TD04 TYPICAL PERFORMANCE CHARACTERISTICS Specifications are at TA = 25°C, VCC = 3.3V unless otherwise noted. Input Threshold Voltage vs Temperature 6.8 55 0.505 VCC = 5V 0.504 50 0.502 45 ICC (μA) 0.501 0.500 0.499 VCC = 3.3V VCC (V) 0.503 40 35 0.498 0.497 30 6.7 10mA 6.6 5mA 6.5 2mA 6.4 1mA 6.3 200μA VCC = 2.3V 0.496 0.495 –50 –25 25 50 0 TEMPERATURE (°C) 25 –50 100 75 –25 25 50 0 TEMPERATURE (°C) 75 6.2 –50 100 6.75 TYPICAL TRANSIENT DURATION (μs) VCC (V) 6.45 –40°C 6.35 25°C 85°C 6.25 –2 0 2 6 4 ICC (mA) 8 10 12 2913 G04 75 100 UV Output Voltage vs VCC 0.8 700 6.55 0 25 50 TEMPERATURE (°C) 2913 G03 Typical Transient Duration vs Comparator Overdrive VCC Shunt Voltage vs ICC 6.65 –25 2913 G02 2913 G01 VCC 600 0.6 500 RESET OCCURS ABOVE CURVE 400 UV VOLTAGE (V) TRHESHOLD VOLTAGE, VUOT (V) VCC Shunt Voltage vs Temperature Supply Current vs Temperature 300 200 0.4 UV WITH 10k PULL-UP 0.2 VCC = 6V UV WITHOUT PULL-UP 100 VCC = 2.3V 0 0.1 1 10 100 COMPARATOR OVERDRIVE PAST THRESHOLD (%) 2913 G05 0 0 0.2 0.6 0.8 0.4 SUPPLY VOLTAGE, VCC (V) 1.0 2913 G06 2913fb 4 LTC2913 TYPICAL PERFORMANCE CHARACTERISTICS Specifications are at TA = 25°C, VCC = 3.3V unless otherwise noted. UV Output Voltage vs VCC 5 PULL-DOWN CURRENT, IUV (mA) VHn = 0.55V SEL = VCC UV VOLTAGE (V) 4 3 2 1 0 0 1 3 4 2 SUPPLY VOLTAGE, VCC (V) 5 1.0 VHn = 0.45V SEL = VCC 4 0.8 UV AT 150mV 25°C UV/OV, VOL (V) 5 UV/OV Voltage Output Low vs Output Sink Current UV, ISINK vs VCC 3 2 1 0.4 0 0.2 1 0 3 4 2 SUPPLY VOLTAGE, VCC (V) 5 0 0 5 10 15 20 IUV/OV (mA) 2913 G08 Reset Timeout Period vs Temperature 25 30 2913 G09 Reset Timeout Period vs Capacitance 10000 CTMR = 1nF UV/OV TIMEOUT PERIOD, tUOTO (ms) UV/OV TIMEOUT PERIOD, tUOTO (ms) 0.6 UV AT 50mV 2913 G07 12 –40°C 85°C 11 1000 10 9 8 7 6 –50 –25 0 25 50 TEMPERATURE (°C) 75 100 2913 G10 100 10 1 0.1 10 100 1 TMR PIN CAPACITANCE, CTMR (nF) 1000 2913 G11 PIN FUNCTIONS DIS (Pin 8, LTC2913-2): Output Disable Input. Disables the OV and UV output pins. When DIS is pulled high, the OV and UV pins are not asserted except during a UVLO condition. DIS has a weak (2μA) internal pull-down to GND. Leave DIS open if unused. Exposed Pad (Pin 11, DFN Package): Exposed Pad may be left open or connected to device ground. GND (Pin 5): Device Ground. LATCH (Pin 8, LTC2913-1): OV Latch Clear/Bypass Input. When pin is pulled low, OV is latched when asserted. When pulled high, OV latch is cleared. While held high, OV has the same delay and output characteristics as UV. OV (Pin 6): Overvoltage Logic Output. Asserts low when either VL input voltage is above threshold. Latched low (LTC2913-1). Held low for programmed delay time after both VL inputs are valid (LTC2913-2). OV has a weak pullup to VCC and may be pulled above VCC using an external pull-up. Leave OV open if unused. 2913fb 5 LTC2913 PIN FUNCTIONS TMR (Pin 9): Reset Delay Timer. Attach an external capacitor (CTMR) of at least 10pF to GND to set a reset delay time of 9ms/nF. A 1nF capacitor will generate an 8.5ms reset delay time. Tie TMR to VCC to bypass timer. UV (Pin 7): Undervoltage Logic Output. Asserts low when either VH input voltage is below threshold. Held low for a programmed delay time after both VH inputs are valid. UV has a weak pull-up to VCC and may be pulled above VCC using an external pull-up. Leave UV open if unused. VCC (Pin 10): Supply Voltage. Bypass this pin to GND with a 0.1μF (or greater) capacitor. Operates as a direct supply input for voltages up to 6V. Operates as a shunt regulator for supply voltages greater than 6V and must have a resistance between the pin and the supply to limit input current to no greater than 10mA. When used without a current-limiting resistance, VCC voltage must not exceed 6V. VH1/VH2 (Pin 1/Pin 3): Voltage High Inputs 1 and 2. When the voltage on this pin is below 0.5V, an undervoltage condition is triggered. Tie pin to VCC if unused. VL1/VL2 (Pin 2/Pin 4): Voltage Low Inputs 1 and 2. When the voltage on this pin is above 0.5V, an overvoltage condition is triggered. Tie pin to GND if unused. BLOCK DIAGRAM 10 9 VCC TMR VCC 400k OSCILLATOR 1 2 3 4 VH1 VL1 VH2 VL2 UV – + – + – + UV PULSE GENERATOR DISABLE 7 VCC UVLO + – 2V 400k VCC OV PULSE GENERATOR DISABLE UVLO – + OV 6 0.5V 5 OV LATCH CLEAR/BYPASS GND + – LATCH 8 1V LTC2913-1 1V DIS 8 + – 2μA LTC2913-2 2913 BD 2913fb 6 LTC2913 APPLICATIONS INFORMATION Voltage Monitoring 2. Choose RB to obtain the desired UV trip point The LTC2913 is a low power dual voltage monitoring circuit with two undervoltage and two overvoltage inputs. A timeout period that holds OV and UV asserted after all faults have cleared is adjustable using an external capacitor and is externally disabled. Once RA is known, RB is chosen to set the desired trip point for the undervoltage monitor. Each voltage monitor has two inputs (VHn and VLn) for detecting undervoltage and overvoltage conditions. When configured to monitor a positive voltage Vn using the 3-resistor circuit configuration shown in Figure 1, VHn is connected to the high side tap of the resistive divider and VLn is connected to the low side tap of the resistive divider. 3. Choose RC to complete the design 3-Step Design Procedure The following 3-step design procedure determines appropriate resistances to obtain the desired UV and OV trip points for the voltage monitor circuit in Figure 1. For supply monitoring, Vn is the desired nominal operating voltage, In is the desired nominal current through the resistive divider, VOV is the desired overvoltage trip point and VUV is the desired undervoltage trip point. 1. Choose RA to obtain the desired OV trip point RA is chosen to set the desired trip point for the overvoltage monitor. RA = 0.5V Vn • In VOV RC = Vn – R A – RB In (3) If any of the variables Vn, In, VUV or VOV change, then each step must be recalculated. Voltage Monitor Example A typical voltage monitor application is shown in Figure 2. The monitored voltage is a 5V ±10% supply. Nominal current in the resistive divider is 10μA. 1. Find RA to set the OV trip point of the monitor. RA = 0.5V 5V •
45.3k 10µ A 5.5V 2. Find RB to set the UV trip point of the monitor. RB = RC = 0.5V 5V • – 45.3k
10.2k 10µA 4.5V + – 5V – 45.3k
10.2k  442k 10µA – + UVn 0.5V + V1 5V ±10% VCC 5V RC 442k – VLn (2) 3. Determine RC to complete the design. LTC2913 VHn RB 0.5V Vn • – RA In VUV Once, RA and RB are known, RC is determined by: (1) Vn RC RB = VCC OV VH1 OVn RB 10.2k LTC2913 UV VL1 RA 45.3k RA 2913 F01 Figure 1. 3-Resistor Positive UV/OV Monitoring Configuration GND 2913 F02 Figure 2. Typical Supply Monitor 2913fb 7 LTC2913 APPLICATIONS INFORMATION Power-Up/Power-Down As soon as VCC reaches 1V during power-up, the UV output asserts low and the OV output weakly pulls to VCC. The LTC2913 is guaranteed to assert UV low and OV high under conditions of low VCC, down to VCC = 1V. Above VCC = 2V (2.1V maximum), the VH and VL inputs take control. Once both VH inputs and VCC are valid, an internal timer is started. After an adjustable delay time, UV weakly pulls high. The two extreme conditions, with a relative accuracy of 1.5% and resistance accuracy of 1%, result in:
RC • 0.99  VUV(MIN) = 0.5V • 0.985 •  1+   (R A + RB ) • 1.01 and
RC • 1.01  VUV(MAX) = 0.5V • 1.015 •  1+   (R A + RB ) • 0.99  RC For a desired trip point of 4.5V, =8 R A + RB Threshold Accuracy Reset threshold accuracy is important in a supply-sensitive system. Ideally, such a system resets only if supply voltages fall outside the exact thresholds for a specified margin. All LTC2913 inputs have a relative threshold accuracy of ±1.5% over the full operating temperature range. For example, when the LTC2913 is programmed to monitor a 5V input with a 10% tolerance, the desired UV trip point is 4.5V. Because of the ±1.5% relative accuracy of the LTC2913, the UV trip point is between 4.433V and 4.567V which is 4.5V ±1.5%. Likewise, the accuracy of the resistances chosen for RA, RB and RC can affect the UV and OV trip points as well. Using the example just given, if the resistances used to set the UV trip point have 1% accuracy, the UV trip range is between 4.354V and 4.650V. This is illustrated in the following calculations. The UV trip point is given as:
RC  VUV = 0.5V  1+  R A + RB  Therefore, 0.99 
VUV(MIN) = 0.5V • 0.985 •  1+ 8 = 4.354V  1.01  and 1.01 
= 4.650V VUV(MAX) = 0.5V • 1.015 •  1+ 8  0.99  Glitch Immunity In any supervisory application, noise riding on the monitored DC voltage causes spurious resets. To solve this problem without adding hysteresis, which causes a new error term in the trip voltage, the LTC2913 lowpass filters the output of the first stage comparator at each input. This filter integrates the output of the comparator before asserting the UV or OV logic. A transient at the input of the comparator of sufficient magnitude and duration triggers the output logic. The Typical Performance Characteristics show a graph of the Transient Duration vs. Comparator Overdrive. 2913fb 8 LTC2913 APPLICATIONS INFORMATION UV/OV Timing Shunt Regulator The LTC2913 has an adjustable timeout period (tUOTO) that holds OV or UV asserted after all faults have cleared. This assures a minimum reset pulse width allowing a settling time delay for the monitored voltage after it has entered the valid region of operation. The LTC2913 has an internal shunt regulator. The VCC pin operates as a direct supply input for voltages up to 6V. Under this condition, the quiescent current of the device remains below a maximum of 80μA. For VCC voltages higher than 6V, the device operates as a shunt regulator and must have a resistance RZ between the supply and the VCC pin to limit the current to no greater than 10mA. When any VH input drops below its designed threshold, the UV pin asserts low. When all inputs recover above their designed thresholds, the UV output timer starts. If all inputs remain above their designed thresholds when the timer finishes, the UV pin weakly pulls high. However, if any input falls below its designed threshold during this timeout period, the timer resets and restarts when all inputs are above the designed thresholds. The OV output behaves as the UV output when LATCH is high (LTC2913-1). Selecting the UV/OV Timing Capacitor The UV and OV timeout period (tUOTO) for the LTC2913 is adjustable to accommodate a variety of applications. Connecting a capacitor, CTMR, between the TMR pin and ground sets the timeout period. The value of capacitor needed for a particular timeout period is: CTMR = tUOTO • 115 • 10–9 [F/s] The Reset Timeout Period vs Capacitance graph found in the Typical Performance Characteristics shows the desired delay time as a function of the value of the timer capacitor that must be used. The TMR pin must have a minimum 10pF load or be tied to VCC. For long timeout periods, the only limitation is the availability of a large value capacitor with low leakage. Capacitor leakage current must not exceed the minimum TMR charging current of 1.3μA. Tying the TMR pin to VCC will bypass the timeout period. Undervoltage Lockout When VCC falls below 2V, the LTC2913 asserts an undervoltage lockout (UVLO) condition. During UVLO, UV is asserted and pulled low while OV is cleared and blocked from asserting. When VCC rises above 2V, UV follows the same timing procedure as an undervoltage condition on any input. When choosing this resistance value, select an appropriate location on the I-V curve shown in the Typical Performance Characteristics to accommodate any variations in VCC due to changes in current through RZ. UV and OV Output Characteristics The DC characteristics of the UV and 0V pull-down strength are shown in the Typical Performance Characteristics. Each pin has a weak internal pull-up to VCC and a strong pulldown to ground. This arrangement allows these pins to have open-drain behavior while possessing several other beneficial characteristics. The weak pull-up eliminates the need for an external pull-up resistor when the rise time on the pin is not critical. On the other hand, the open-drain configuration allows for wired-OR connections, and is useful when more than one signal needs to pull down on the output. VCC of 1V guarantees a maximum VOL = 0.15V at UV. At VCC = 1V, the weak pull-up current on OV is barely turned on. Therefore, an external pull-up resistor of no more than 100k is recommended on the OV pin if the state and pull-up strength of the OV pin is crucial at very low VCC. Note however, by adding an external pull-up resistor, the pull-up strength on the OV pin is increased. Therefore, if it is connected in a wired-OR connection, the pull-down strength of any single device must accommodate this additional pull-up strength. Output Rise and Fall Time Estimation The UV and OV outputs have strong pull-down capability. The following formula estimates the output fall time (90% to 10%) for a particular external load capacitance (CLOAD): tFALL ≈ 2.2 • RPD • CLOAD 2913fb 9 LTC2913 APPLICATIONS INFORMATION where RPD is the on-resistance of the internal pull-down transistor, typically 50Ω at VCC > 1V and at room temperature (25°C). CLOAD is the external load capacitance on the pin. Assuming a 150pF load capacitance, the fall time is 16.5ns. is held high, the latch is bypassed and the OV pin behaves the same as the UV pin with a similar timeout period at the output. If LATCH is pulled low while the timeout period is active, the OV pin latches as before. The rise time on the UV and OV pins is limited by a 400k pull-up resistance to VCC. A similar formula estimates the output rise time (10% to 90%) at the UV and OV pins: Disable (LTC2913-2) tRISE ≈ 2.2 • RPU • CLOAD where RPU is the pull-up resistance. OV Latch (LTC2913-1) With the LATCH pin held low, the OV pin latches low when an OV condition is detected. The latch is cleared by raising the LATCH pin high. If an OV condition clears while LATCH The LTC2913-2 allows disabling the UV and OV outputs via the DIS pin. Pulling DIS high will force both outputs to remain weakly pulled high, regardless of any faults that occur on the inputs. However, if a UVLO condition occurs, UV asserts and pulls low, but the timeout function is bypassed. UV pulls high as soon as the UVLO condition is cleared. DIS has a weak 2μA (typical) internal pull-down current guaranteeing normal operation with the pin left open. TYPICAL APPLICATIONS Dual UV/OV Supply Monitor, 10% Tolerance, 5V, 3.3V 5V POWER 3.3V SUPPLIES Supply Monitor Powered from 12V, 10% Tolerance, 12V, 5V 12V POWER SUPPLIES 5V CBYP 0.1μF 1 RC2 27.4k 2 3 RA1 4.53k CBYP 0.1μF 10 RC1 44.2k RB1 1k RZ 10k RB2 1k RA2 4.53k VCC SYSTEM VH1 LTC2913-1 VL1 OV VH2 UV 6 RB1 1k 7 10 RC1 115k 1 RC2 44.2k 2 3 4 VL2 GND 5 LATCH TMR 9 8 RA1 4.53k 2913 TA02 CTMR 22nF TIMEOUT = 200ms RB2 1k RA2 4.53k 4 VCC VH1 TMR LTC2913-2 VL1 OV VH2 UV VL2 DIS SYSTEM 9 6 7 8 GND 5 2913 TA03 2913fb 10 LTC2913 PACKAGE DESCRIPTION DD Package 10-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1699) R = 0.115 TYP 6 0.38 ± 0.10 10 0.675 ±0.05 3.50 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 3.00 ±0.10 (4 SIDES) PACKAGE OUTLINE 1.65 ± 0.10 (2 SIDES) PIN 1 TOP MARK (SEE NOTE 6) (DD10) DFN 1103 5 0.25 ± 0.05 0.50 BSC 0.75 ±0.05 0.200 REF 0.25 ± 0.05 1 0.50 BSC 2.38 ±0.05 (2 SIDES) 2.38 ±0.10 (2 SIDES) 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE MS Package 10-Lead Plastic MSOP (Reference LTC DWG # 05-08-1661) 3.00 ± 0.102 (.118 ± .004) (NOTE 3) 0.889 ± 0.127 (.035 ± .005) 5.23 (.206) MIN 3.20 – 3.45 (.126 – .136) 0.254 (.010) 0.497 ± 0.076 (.0196 ± .003) REF 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 4.90 ± 0.152 (.193 ± .006) DETAIL “A” 0° – 6° TYP GAUGE PLANE 1 2 3 4 5 0.53 ± 0.152 (.021 ± .006) DETAIL “A” 0.50 0.305 ± 0.038 (.0197) (.0120 ± .0015) BSC TYP RECOMMENDED SOLDER PAD LAYOUT 10 9 8 7 6 0.86 (.034) REF 1.10 (.043) MAX 0.18 (.007) SEATING PLANE NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 0.17 – 0.27 (.007 – .011) TYP 0.50 (.0197) BSC 0.127 ± 0.076 (.005 ± .003) MSOP (MS) 0603 2913fb Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. 11 LTC2913 TYPICAL APPLICATION Dual UV/OV Supply Monitor with LED Undervoltage and Overvoltage Indicator and Manual Undervoltage Reset Button, 10% Tolerance, 12V, 5V 12V POWER 5V SUPPLIES 0.1μF 44.2k 1k 2.05M 510Ω 510Ω LED LED VCC VH1 LTC2913-2 SYSTEM VL1 OV VH2 UV 4.53k 100k 10k VL2 GND DIS TMR 2913 TA05 22nF TIMEOUT = 200ms MANUAL RESET BUTTON (NORMALLY OPEN) RELATED PARTS PART NUMBER LTC1326/ LTC1326-2.5 LTC1726-2.5/ LTC1726-5 LTC1727-2.5/ LTC1727-5 LTC1728-1.8/ LTC1728-3.3 LTC1728-2.5/ LTC1728-5 LTC1985-1.8 LTC2900 LTC2901 LTC2902 LTC2903 LTC2904 LTC2905 LTC2906 LTC2907 LTC2908 LTC2909 LTC2910 LTC2914 DESCRIPTION COMMENTS Micropower Precision Triple Supply Monitor for 5V/2.5V, 3.3V 4.725V, 3.118V, 1V Threshold (±0.75%) and ADJ Micropower Triple Supply Monitor for 2.5V/5V, 3.3V and ADJ Adjustable RESET and Watchdog Time-Outs Micropower Triple Supply Monitor with Open-Drain Reset Individual Monitor Outputs in MSOP Micropower Triple Supply Monitor with Open-Drain Reset 5-Lead SOT-23 Package Micropower Triple Supply Monitor with Open-Drain Reset 5-Lead SOT-23 Package Micropower Triple Supply Monitor with Open-Drain Reset Programmable Quad Supply Monitor 5-Lead SOT-23 Package Adjustable RESET, 10-Lead MSOP and 3mm × 3mm 10-Lead DFN Package Programmable Quad Supply Monitor Adjustable RESET and Watchdog Timer, 16-Lead SSOP Package Programmable Quad Supply Monitor Adjustable RESET and Tolerance, 16-Lead SSOP Package, Margining Functions Precision Quad Supply Monitor 6-Lead SOT-23 Package, Ultralow Voltage Reset 3-State Programmable Precision Dual Supply Monitor Adjustable Tolerance, 8-Lead SOT-23 Package 3-State Programmable Precision Dual Supply Monitor Adjustable RESET and Tolerance, 8-Lead SOT-23 Package Precision Dual Supply Monitor 1-Selectable and 1 Adjustable Separate VCC Pin, RST/RST Outputs Precision Dual Supply Monitor 1-Selectable and 1 Adjustable Separate VCC, Adjustable Reset Timer Precision Six Supply Monitor (Four Fixed & 2 Adjustable) 8-Lead SOT-23 and DFN Packages Prevision Dual Input UV, OV and Negative Voltage Monitor Separate VCC Pin, Adjustable Reset Timer, 8-Lead TSOT-23 and DFN Packages Octal Positive/Negative Voltage Monitor Separate VCC Pin, Eight Inputs, Up to Two Negative Monitors Adjustable Reset Timer, 16-Lead SSOP and DFN Packages Quad UV/OV Positive/Negative Voltage Monitor Separate VCC Pin, Four inputs, Up To Two Negative Monitors, Adjustable Reset Timer, 16-Lead SSOP and DFN Packages 2913fb 12 Linear Technology Corporation LT 1007 • REV B • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2006