ZHCSRX9A August 2023 – January 2024 TPS7A53B
PRODUCTION DATA
- 1
- 1 特性
- 2 應用
- 3 說明
- 4 Pin Configuration and Functions
- 5 Specifications
- 6 Detailed Description
-
7 Application and Implementation
- 7.1
Application Information
- 7.1.1 Recommended Capacitor Types
- 7.1.2 Soft-Start and Inrush Current
- 7.1.3 Optimizing Noise and PSRR
- 7.1.4 Charge Pump Noise
- 7.1.5 Current Sharing
- 7.1.6 Adjustable Operation
- 7.1.7 Power-Good Operation
- 7.1.8 Undervoltage Lockout (UVLO) Operation
- 7.1.9 Dropout Voltage (VDO)
- 7.1.10 Device Behavior During Transition From Dropout Into Regulation
- 7.1.11 Load Transient Response
- 7.1.12 Reverse Current Protection Considerations
- 7.1.13 Power Dissipation (PD)
- 7.1.14 Estimating Junction Temperature
- 7.1.15 TPS7A53EVM Thermal Analysis
- 7.2 Typical Application
- 7.3 Power Supply Recommendations
- 7.4 Layout
- 7.1
Application Information
- 8 Device and Documentation Support
- 9 Revision History
- 10Mechanical, Packaging, and Orderable Information
4 Pin Configuration and Functions
Figure 4-1 RPS
Package,2.5mm × 2.2mm, 12-Pin
VQFN(Top View)Table 4-1 Pin Functions
| PIN | DESCRIPTION | ||
|---|---|---|---|
| NAME | NO. | I/O | |
| BIAS | 5 | I | BIAS pin. This pin enables using low-input voltage, low-output (LILO) voltage conditions (that is, VIN = 1.2V, VOUT = 1V) to reduce power dissipation across the die. Using a BIAS voltage improves dc and ac performance for VIN ≤ 2.2V. A 1μF capacitor or larger must be connected between this pin and ground. If not used, this pin must be left floating or tied to ground. |
| EN | 3 | I | Enable pin. Driving this pin to logic high enables the device; driving this pin to logic low disables the device. This pin must be connected to IN or BIAS if not driven externally. |
| FB | 9 | I | Feedback pin. Although not required, use a 10nF feed-forward capacitor from FB to OUT (as close to the device as possible) to maximize ac performance. A feed-forward capacitor can disrupt power-good (PG) functionality. See the Adjustable Operation section for more details. |
| GND | 6, 7, 12 | — | Ground pin. These pins must be connected to ground and each other with a low-impedance connection. |
| IN | 1, 2 | I | Input supply voltage pin. Use a 10μF or larger ceramic capacitor (5μF or greater of capacitance) from IN to ground to reduce input supply impedance. Place the input capacitor as close to the input as possible. See the Input and Output Capacitor Requirements section for more details. |
| NR/SS | 4 | — | Noise-reduction and soft-start pin. Connecting an external capacitor between this pin and ground reduces reference voltage noise and also enables the soft-start function. Although not required, connect a 10nF or larger capacitor from NR/SS to GND (as close to the pin as possible) to maximize ac performance. See the Noise-Reduction and Soft-Start Capacitor section for more details. |
| OUT | 10, 11 | O | Regulated output pin. A 47μF or larger ceramic capacitor (25μF or greater of capacitance) from OUT to ground is required for stability and must be placed as close to the output as possible. Minimize the impedance from the OUT pin to the load. See the Input and Output Capacitor Requirements section for more details. |
| PG | 8 | O | Active-high, power-good pin. An open-drain output indicates when the output voltage reaches VIT(PG) of the target. A feed-forward capacitor can disrupt PG (power good) functionality. See the Power-Good Output section for more details. |