RT9008GE.pdf
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RT9008GE combines a flexible external MOSFET architecture with a precision control loop and soft-start capability. This section summarizes the most important aspects engineers usually care about when evaluating an LDO controller.
RT9008GE is not a fully integrated regulator. It uses an external N-MOSFET as the pass element while the IC provides the reference, error amplifier and gate drive. This allows designers to select MOSFETs that match the required current and thermal limits, achieving very low dropout at high load.
The 0.8 V reference (±2%) and well-compensated error amplifier deliver tight output regulation over line and load variations. Typical quiescent current is around 0.3 mA, which keeps controller overhead small, especially in systems with long standby times.
Soft-start is programmed by an external capacitor. During ramp-up, the controller limits the gate drive so that input surge current and output overshoot are minimized. This is critical when RT9008GE is used to power downstream digital ICs or when multiple rails must start in sequence.
Thanks to the LDO topology and high-gain loop, RT9008GE can provide clean output rails with good PSRR, helping to filter switching ripple from upstream DC-DC converters. When used with appropriate output capacitors, it is suitable for noise-sensitive analog, RF or clock circuits.
The device is qualified for industrial-grade operation from −40 °C to +125 °C ambient. The reference and amplifier are designed to maintain accuracy and stability over temperature, making RT9008GE suitable for networking equipment, base-stations and factory automation.
Packaged in a compact SOT-23-6, RT9008GE occupies minimal PCB area. Because the external MOSFET dissipates most of the heat, careful placement of the MOSFET and output capacitor close to the IC pins is recommended to reduce parasitic resistance and improve transient performance.
| Input Voltage Range | 4.5 V – 13.5 V (recommended operating range) |
|---|---|
| Reference Voltage | 0.8 V ± 2% across full temperature range |
| Pass Element | External N-channel MOSFET, user selectable for current and RDS(on) |
| Typical Quiescent Current | ≈ 0.3 mA in normal operation (no load) |
| Soft-Start | Programmable with an external capacitor; controls output ramp and inrush current |
| Package | SOT-23-6, RoHS compliant |
| Operating Temperature | −40 °C to +125 °C (ambient, industrial-grade) |
RT9008GE is offered in a 6-pin SOT-23-6 package. The pins are arranged to support straightforward routing of the input supply, external MOSFET gate drive and feedback network. The table below summarizes the typical pin functions:
VCC – Supply input for the controller core. DRI – Gate drive output to the external N-MOSFET. SS – Soft-start pin used with an external capacitor to shape the output ramp. FB – Feedback input used to sense the output voltage. GND – Ground reference. EN – Enable control; logic high turns the controller on.
RT9008GE uses a standard SOT-23-6 surface-mount package, which is widely supported by PCB manufacturers and assembly houses. Its small footprint is suitable for dense power modules and compact control boards.
Mechanical dimensions, including body height, lead pitch and pad recommendations, should follow the latest Richtek package drawing and the board manufacturer's design rules. This helps to ensure reliable solder joints and consistent coplanarity in mass production.
Used to provide low-noise rails for PHY, SerDes, clock generators and management controllers in switches, routers, base-stations and optical modules.
Supplies microcontrollers, sensors and interface ICs on PLC cards, motion controllers and factory automation nodes that require reliable startup and long-term stability.
Acts as a post-regulator behind POL converters to generate quiet rails for chipsets, SSD controllers or auxiliary logic in servers and IPCs.
Suitable for embedded control boards, smart appliances and communication gateways where compact power stages and controlled startup are important.
When considering alternatives to RT9008GE, engineers usually look for LDO controllers or linear regulators with a similar input range, reference level and external MOSFET capability. Potential options include other members of the Richtek RT9008 family, as well as devices from Texas Instruments, Diodes Inc. and Microchip that offer comparable dropout, startup behavior and loop stability.
Richtek Technology Corporation is a Taiwanese analog IC vendor focusing on power management, DC-DC converters and linear regulators. Its solutions are widely used in notebooks, displays, networking and industrial equipment. Long-term supply and solid technical documentation make Richtek a dependable partner for OEM and EMS customers.
We currently provide peer-to-peer order processing. Submit an RFQ for RT9008GE, and our professional agent will contact you with competitive global pricing and guide you to complete the order once you accept the offer.
Our experienced QC team strictly verifies and tests RT9008GE. Only qualified suppliers who pass our audit can list RT9008GE on OEM STOCK GLOBAL LIMITED. We pay close attention to sourcing channels and product quality so you can purchase with confidence.
Pricing and inventory for RT9008GE fluctuate and are updated periodically (typically within 24 hours). Quotations generally remain valid for 5 days unless otherwise stated.
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We perform Pre-Shipment Inspection (PSI) on randomly selected units before shipping. If there is an issue with RT9008GE, returns/replacements are accepted when:
Steps: (1) Inform us within 90 days; (2) Obtain Return Authorization (RMA) before sending items back.
Please contact us for technical documents and support related to Richtek USA Inc. RT9008GE, including pin diagrams and datasheets. Our team will respond promptly.
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