| Capability | Implementation | |---------------------------|----------------------------------------------| | Queue Pairs (QP) | Up to 8M hardware QPs | | Work Requests (WR) | Inline up to 256B; remainder via descriptor | | Memory Region (MR) | 2M MRs, key translation via MTT (Memory Translation Table) | | Reliable Connection (RC) | Go-back-N / Selective ACK (PSN handling) | | Atomic Operations (over net)| Fetch-add, compare-swap (64-bit aligned) | | In-order delivery assurance| Hardware replay buffer (2MB per QP config) |
Deep Architecture – E2H implements a QP scheduler with hierarchical QoS:
A typical application circuit for the DC E2H module would include:
The DC E2H datasheet provides detailed specifications and application guidelines for a high-performance DC-DC converter module. Its high efficiency, wide input voltage range, and adjustable output voltage make it an ideal choice for a broad spectrum of power supply applications. For precise details and to ensure compatibility, users should consult the official datasheet of the component or contact the manufacturer.
Comprehensive Technical Guide: DC=E2H (RT9193-18GB) Datasheet & Specifications
The SMD top-side marking DC=E2H identifies the highly popular Richtek Technology RT9193-18GB, a high-performance, ultra-low-noise CMOS Low Dropout (LDO) linear voltage regulator. Packaged in a compact SOT-23-5, this integrated circuit delivers a stable 1.8V output at up to 300mA.
It is widely deployed in noise-sensitive, space-constrained environments such as RF modules, handheld medical instruments, cellular devices, and battery-powered IoT hardware. 1. Device Overview & Pinout
The DC=E2H marking breaks down into two segments: DC= is the specific product code for the 1.8V fixed output variant of the RT9193 series, while E2H represents the internal manufacturing batch, assembly location, and date code. SOT-23-5 Pin Configuration The device uses a standard 5-pin surface-mount package. Pin Number Description 1 VIN
Power Supply Input Pin. Requires a minimum input voltage of 2.5V up to 5.5V. 2 GND Ground Reference. 3 EN dc e2h datasheet
Active-High Enable Input. Drives the regulator into shutdown mode when pulled low. 4 BP/NC
Noise Bypass Pin. Connecting a 10nF capacitor reduces overall output noise. 5 VOUT Regulated Fixed 1.8V Output Pin. 2. Key Specifications & Electrical Characteristics
Operating with a wide input voltage range, the RT9193-18GB maintains a stable regulated output even as battery voltage declines over time. Absolute Maximum Ratings Input Supply Voltage ( VINcap V sub cap I cap N end-sub ): -0.3V to 6.0V Enable Input Voltage ( VENcap V sub cap E cap N end-sub ): -0.3V to VINcap V sub cap I cap N end-sub Power Dissipation ( PDcap P sub cap D ): 400mW at Junction Temperature ( TJcap T sub cap J ): -40°C to +125°C Lead Temperature (Soldering, 10s): 260°C Recommended Operating Conditions Input Voltage Range ( VINcap V sub cap I cap N end-sub ): 2.5V to 5.5V Operating Ambient Temperature ( TAcap T sub cap A ): -40°C to +85°C Electrical Characteristics Below are the key operational metrics measured at unless otherwise specified: Conditions Output Voltage VOUTcap V sub cap O cap U cap T end-sub Output Current IOUTcap I sub cap O cap U cap T end-sub Continuous load Dropout Voltage VDROPcap V sub cap D cap R cap O cap P end-sub Quiescent Current IQcap I sub cap Q Shutdown Current ISHDNcap I sub cap S cap H cap D cap N end-sub Line Regulation ΔVLINEcap delta cap V sub cap L cap I cap N cap E end-sub Load Regulation ΔVLOADcap delta cap V sub cap L cap O cap A cap D end-sub Power Supply Rejection PSRR Output Noise eNe sub cap N Thermal Shutdown TSDcap T sub cap S cap D end-sub Junction temperature rising 3. Notable Features & Benefits 1. Ultra-Low Noise Performance
For RF transceivers, Bluetooth modules, and wireless networking hardware, input supply ripples can degrade signal integrity. The addition of a 10nF bypass capacitor connected to Pin 4 drops the output noise floor down to a mere . 2. Low Dropout (LDO) Profile
Featuring a low dropout voltage of 220mV at full 300mA load, this regulator extends the usable battery life of lithium-ion or dual-alkaline powered devices. 3. Comprehensive Circuit Protection The RT9193-18GB includes integrated safety mechanisms:
Current Limiting: Protects the regulator and upstream power supply during output short circuits or overload conditions.
Thermal Shutdown: Deactivates the pass transistor if the silicon junction temperature exceeds 165°C, preventing permanent damage. 4. Direct Ceramic Capacitor Support
Advanced internal phase compensation allows the device to function seamlessly with Erratic Counting:
low-ESR ceramic capacitors on both the input and output lines. This reduces physical footprint size compared to older regulators requiring bulkier tantalum capacitors. 4. Typical Application Circuit
Designing with the DC=E2H requires minimal external parts. The baseline implementation uses just three capacitors to achieve optimal performance:
Typical Application Schematic VIN ───┬──────────────┬────────────── VOUT (1.8V Regulated) │ │ ┌─┴──────────────┴─┐ │ 1 VIN VOUT 5 │ │ │ Enable ────►│ 3 EN GND 2 │ Signal │ │ │ 4 BP │ └────────┬─────────┘ │ ▼ (GND) Component Guidelines Input Capacitor ( CINcap C sub cap I cap N end-sub ): A
or larger ceramic capacitor is recommended directly adjacent to the input pin to buffer transient voltage drops from long battery leads. Output Capacitor ( COUTcap C sub cap O cap U cap T end-sub ): Place a
ceramic capacitor directly at Pin 5 for control loop stability and fast transient response. Bypass Capacitor ( CBYPcap C sub cap B cap Y cap P end-sub
): A 10nF capacitor placed between Pin 4 and Ground stabilizes the internal reference voltage and filters noise. Радиоремонт
Микросхема RT9193-18GB купить в интернет-магазине
The marking DC=E2H typically identifies the RT9193-18GB, a high-performance, 300mA low-dropout (LDO) linear regulator from Richtek. It is commonly used in portable electronics due to its ultra-low noise and high Power Supply Rejection Ratio (PSRR). Key Specifications Damaged Encoder:
The following parameters are standard for the RT9193-18GB variant:
Output Voltage: Fixed at 1.8V (indicated by the "-18" in the part number). Output Current: Up to 300mA. Dropout Voltage: Typically 220mV at full 300mA load. Input Voltage Range: Supports 2.5V to 5.5V. Package Type: SOT-23-5 (5-pin Small Outline Transistor).
Quiescent Current: Low power consumption, typically around 90µA.
Stability: Optimized for use with low-ESR ceramic capacitors (1µF recommended). Key Features
Ultra-Low Noise: Specifically designed for RF and wireless applications where power supply noise must be minimized.
High PSRR: Provides excellent rejection of input ripples (70dB at 1kHz), making it ideal for battery-powered devices.
Safety Protections: Includes internal thermal shutdown for over-temperature protection and current limiting to prevent damage during short circuits or overloads.
Fast Response: Fast transient response to load and line changes. Applications
Due to its small footprint and low noise profile, it is frequently found in: Mobile phones and handheld devices. Wireless LAN and Bluetooth modules. Digital cameras. Battery-powered equipment requiring a stable 1.8V rail.
The datasheet says minimum load = 10% (10mA). Your CAN transceiver draws 5mA in sleep mode. Problem: Output voltage may rise to 5.4V, damaging the transceiver. Solution: Add a 510Ω resistor across the output (5V / 510Ω ≈ 9.8mA).