MAX1907AETL Maxim Integrated Products, MAX1907AETL Datasheet
MAX1907AETL
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MAX1907AETL Summary of contents
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... Output Overvoltage Protection (MAX1907A Only) ♦ Undervoltage and Thermal Fault Protection ♦ Power Sequencing and Selectable Boot Voltage ♦ Low-Profile 40-Pin Thin QFN, 6mm rails within the Package PART MAX1907AETL -40°C to +100°C MAX1981AETL -40°C to +100°C TOP VIEW ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) ABSOLUTE MAXIMUM RATINGS V+ to GND ..............................................................-0.3V to +30V GND .....................................................-0. SYSPOK, IMVPOK, CLKEN to GND .........................-0.3V to +6V DPSLP, SUS, ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 15V 1.26V, ILIM = V , SUS = D5 = D1= D0 ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 15V 1.26V, ILIM = V , SUS = D5 = D1= D0 ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 15V 1.26V, ILIM = V , SUS = D5 = D1= D0 ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) ELECTRICAL CHARACTERISTICS (Circuit of Figure 15V 1.26V, ILIM = V , SUS = ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 15V 1.26V, ILIM = V , SUS = ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 15V 1.26V, ILIM = V , SUS = ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) (Circuit of Figure 12V VOLTAGE-POSITIONED OUTPUT vs. LOAD CURRENT (V = 1.436V) OUT 1.46 1.44 1.42 1.40 1.38 1.36 1.34 1.32 ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) (Circuit of Figure 12V FREQUENCY vs. TEMPERATURE 350 330 20A LOAD 310 290 NO LOAD 270 SINGLE PHASE V = 1.436V ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) (Circuit of Figure 12V VPS AMPLIFIER OFFSET VOLTAGE vs. COMMON-MODE VOLTAGE 180 160 140 120 100 VPS AMPLIFIER ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) (Circuit of Figure 12V SOFT SHUTDOWN MAX1907A/81A toc25 40μs/div 5V, 5V/div SHDN ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) (Circuit of Figure 12V LOAD TRANSIENT (HIGHEST FREQUENCY) 30A 0 1.436V OUT B. V OUT C. I ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) PIN NAME Boot-Mode Voltage Select Inputs. B0–B2 are four-level digital inputs that select the boot-mode VID code (Table 6) for the boot-mode multiplexer inputs. During power-up, the boot-mode VID ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) PIN NAME 19 CSN Negative Current-Limit Input. Connect to the negative terminal of the current-sense resistor. Deep-Sleep Control Input. When DPSLP is low the system enters the deep-sleep state ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) PIN NAME Open-Drain Power Good Output. After output voltage transitions, except during power-up and power-down, if OUT is in regulation then IMVPOK is high impedance. IMVPOK is pulled high ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) R14 R13 R12 R11 100kΩ 100kΩ 100kΩ 10Ω C2 1μF DAC INPUTS (1V LOGIC) SUSPEND INPUTS (4-LEVEL LOGIC) BOOT INPUTS (4-LEVEL LOGIC) MODE CONTROL ON OFF FLOAT (300kHz) C ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) R15 10Ω C7 0.22μF FLOAT (300kHz) D3 OUTPUT C R COMP COMP 270pF 20kΩ REF (MASTER) R16 200kΩ 100pF R17 49.9kΩ 1% DDO (MASTER) CONNECT TO ILIM ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Table 2. Component Suppliers SUPPLIER BI Technologies Central Semiconductor Coilcraft Coiltronics Fairchild Semiconductor International Rectifier Kemet Panasonic Sanyo Siliconix (Vishay) Sumida Taiyo Yuden TDK Toko Detailed Description 5V Bias ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) V+ TON CSP CSN ILIM 0.9 x REF CLKEN POWER-GOOD LOGIC IMVPOK Figure 2. MAX1907A/MAX1981A Functional Diagram 20 ______________________________________________________________________________________ ON-TIME COMPUTE MAX1907A MAX1981A ONE-SHOT Q TRIG ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) expected drop across the low-side MOSFET switch. This algorithm results in a nearly constant switching fre- quency despite the lack of a fixed-frequency clock gen- erator. The benefits of ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Forced-PWM operation comes at a cost: the no-load 5V bias supply current remains between 10mA to 40mA, depending on the external MOSFETs and switching fre- quency. To maintain high ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Δ BATT OUT = Δ ON-TIME TIME LIMIT(VALLEY) LOAD(MAX) 0 TIME Figure 4. "Valley" Current-Limit Threshold Point ciency vs. load curve, ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) pling between LX and DL created by the MOSFETs’ gate-to-drain capacitance (C RSS ( and additional board parasitics should not ISS RSS exceed the following minimum threshold ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) This results in large negative inductor current and possi- bly small negative output voltages this fashion, the output can be clamped with a Schottky diode to ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Table 4. Operating Mode Truth Table SHDN DPSLP SYSPOK SUS ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Table 5. Output Voltage VID DAC Codes (SUS = Low ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Table 6. Suspend Mode DAC Codes (SUS = High GND GND GND GND GND REF GND GND OPEN GND GND V CC GND REF GND GND ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Table 7. Boot-Mode DAC Codes (Power-Up GND GND GND GND GND REF GND GND OPEN GND GND V CC GND REF GND GND REF REF GND ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV S0–S2 DECODER OUT S2 SUS B0–B2 DECODER OUT B2 SYSPOK Figure 7. Internal Multiplexers Functional Diagram 30 ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Internal Multiplexers The MAX1907A/MAX1981A has two unique internal DAC input multiplexers (muxes) that can select one of three different DAC code settings for different proces- sor states. On startup, ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Output Undervoltage Shutdown The output undervoltage protection (UVP) function is similar to foldback current limiting, but employs a timer rather than a variable current limit. If the MAX1907A/MAX1981A output ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) Inductor Selection The switching frequency and operating point (% ripple or LIR) determine the inductor value as follows: ( − OUT IN OUT ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) In non-CPU applications, the output capacitor’s size often depends on how much ESR is needed to maintain an acceptable level of output ripple voltage. The output ripple voltage of ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) The easiest method for checking stability is to apply a very fast zero-to-max load transient and carefully observe the output-voltage-ripple envelope for over- shoot and ringing. It can help ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) where C is the reverse transfer capacitance of N RSS and I is the peak gate-drive source/sink current GATE (1A, typ). Switching losses in the high-side MOSFET can become ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) The voltage-positioned circuit determines the load current from the voltage across the current-sense resistors ( connected between the inductors SENSE CM CS and output ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) CAPACITIVE SOAR (dV/ ESR VOLTAGE STEP ( STEP ESR V OUT CAPACITIVE SAG (dV/ RECOVERY OUT OUT I LOAD Figure ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) PC Board Layout Guidelines Careful PC board layout is critical to achieve low switching losses and clean, stable operation. The switching power stage requires particular attention (Figure 11). If ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) the master to the analog ground in the slave to pre- vent ground offsets. A low value (≤10Ω) resistor is sufficient to link the two grounds. 4) Keep the ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) MAX1907A MAX1981A (MASTER) CURRENT ACTIVE VOLTAGE POSITIONING CURRENT BALANCE AND CURRENT LIMIT (SLAVE) MAX1980 ______________________________________________________________________________________ 5V BIAS SUPPLY LIMIT TRIGGER Typical Operating Circuit INPUT OUTPUT IMVP-IV CPU 5V BIAS ...
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Quick-PWM Master Controllers for Voltage- Positioned CPU Core Power Supplies (IMVP-IV) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 42 ______________________________________________________________________________________ Package Information ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 43 © 2002 Maxim Integrated Products ...