PMIC - Power Distribution Switches, Load Drivers

Part Number	Description / PDF	Quantity
MIC2547-2BTSTR Roving Networks / Microchip Technology	DUAL CURRENT LIMIT SWITCH	5000
MIC2033-05AYM6-TR Roving Networks / Microchip Technology	IC PWR SWITCH P-CHAN 1:1 SOT23-6	2518
MIC95410YFL-TR Roving Networks / Microchip Technology	IC PWR SWITCH N-CHAN 1:1 10FQFN	790
MIC2546-1BM Roving Networks / Microchip Technology	DUAL PROG CURRENT LIMIT SWITCH	7740
MIC94066YML-TR Roving Networks / Microchip Technology	IC PWR SWITCH P-CHAN 1:1 8MLF	4803
MIC2562A-0BM Roving Networks / Microchip Technology	CARDBUS SOCKET POWER CONTROLLER	327
MIC2043-2YTS-TR Roving Networks / Microchip Technology	IC PWR SWITCH N-CHAN 1:1 14TSSOP	0
MIC2077-1YM Roving Networks / Microchip Technology	IC PWR SWITCH N-CH 2X1:2 16SOIC	244
MIC2008YM6 Roving Networks / Microchip Technology	ADJUSTABLE CURRENT LIMIT POWER D	1021
MIC2545A-1BM Roving Networks / Microchip Technology	PROGRAMMABLE HIGH-SIDE SWITCH	17987
MIC2563A-1YSM Roving Networks / Microchip Technology	IC PWR SWITCH N-CHAN 3:4 28SSOP	413
MIC2033-10BYMT-TR Roving Networks / Microchip Technology	IC PWR SWITCH P-CHAN 1:1 6TDFN	0
DRF1211 Roving Networks / Microchip Technology	RF MOSFET (VDMOS) DRIVER 500V 60	0
MIC2544-2BMM Roving Networks / Microchip Technology	PROGRAMMABLE HIGH-SIDE SWITCH	6555
MIC2548-1BMM Roving Networks / Microchip Technology	PROGRAMMABLE HIGH-SIDE SWITCH	1277
MIC2544-1BMMTR Roving Networks / Microchip Technology	CURRENT LIMIT HIGH-SIDE SWITCH	12500
MIC2536-2BMM Roving Networks / Microchip Technology	DUAL USB PWR DISTRIBUTION SWITCH	2800
MIC2561-0BM TR Roving Networks / Microchip Technology	PCMCIA CARD SOCKET VCC AND VPP S	0
DRF1301 Roving Networks / Microchip Technology	IC PWR DRIVER N-CHANNEL 1:1	0
UCS2113T-2C-V/G4 Roving Networks / Microchip Technology	DUAL USB PORT POWER SWITCH	0

PMIC - Power Distribution Switches, Load Drivers

1. Overview

Power Management Integrated Circuits (PMICs) featuring Power Distribution Switches and Load Drivers are critical components in modern electronic systems. These devices manage power routing, load control, and protection functions in applications ranging from portable devices to industrial equipment. Power Distribution Switches handle voltage/current path selection, while Load Drivers provide controlled driving capability for high-current loads. Their integration improves system efficiency, reduces component count, and enhances reliability.

2. Main Types & Functional Classification

Type	Functional Characteristics	Application Examples
Load Switches	Low R_DS(on), fast turn-on/off, inrush current control	Smartphones, laptops, servers
Distribution Switches	Multi-channel power path management, fault isolation	Automotive systems, industrial PLCs
Smart Load Drivers	Integrated FETs + protection logic, current sensing	Robotics, motor controls, LED lighting
Hot Swap Controllers	Controlled startup, overcurrent/voltage protection	Data center servers, telecom equipment

3. Structure & Composition

Typical components include:

Power MOSFETs (usually NMOS/PMOS) with low on-resistance
Gate drivers and control logic circuits
Protection modules (OCP, OVP, OTP, UVLO)
Current sensing elements (shunt resistors or amplifiers)
Thermal management structures (heat spreaders, thermal vias)

Common packaging: QFN, TSSOP, BGA with exposed thermal pads

4. Key Technical Specifications

Parameter	Description	Importance
R_DS(on)	On-state resistance (1-50 m range)	Directly affects conduction loss
I_MAX	Maximum continuous current (0.5-10A typical)	Determines load capacity
V_SUPPLY	Operating voltage range (2.7-40V typical)	System compatibility factor
t_ON/OFF	Switching transition time (1-100 s)	Affects EMI and power efficiency
Quiescent Current	Standby power consumption ( A range)	Battery life consideration

5. Application Fields

Consumer Electronics: Smartphones (display/backlight drivers), notebooks (peripheral power control)
Automotive: Electric vehicle power distribution, ADAS sensor power management
Industrial: PLCs, motor drives, test equipment
Telecom/Datacom: Server power rails, PoE systems, base stations
Medical: Portable diagnostic devices, imaging equipment

6. Leading Manufacturers & Products

Manufacturer	Product Series	Key Features
Texas Instruments	TPS229xx family	18m R_DS(on), 6A rating, load current monitoring
STMicroelectronics	VN7000 series	Smart high-side switches, automotive qualified
Infineon	BTS7xx series	Integrated diagnostics, 24V operation
ON Semiconductor	NCP380 series	40V tolerant, fast overcurrent protection

7. Selection Recommendations

Key consideration factors:

Current/voltage requirements with safety margins (>20% over spec)
Thermal performance: Junction-to-ambient thermal resistance
Protection features matching application environment
Control interface compatibility (GPIO, I2C, PWM)
Package size vs. board space constraints

Case Study: For a 12V/3A motor driver in an industrial robot, select a device with:

R_DS(on) < 30m to limit loss to <0.27W
Operating temperature range -40 C to 125 C
Integrated current sensing for feedback control

8. Industry Trends

Integration of GaN/SiC FETs for higher efficiency (2024-2030)
Development of bidirectional switches for energy recovery systems
Increasing adoption of digital control interfaces (PMBus compliance)
Tighter functional safety compliance (ISO 26262 for automotive)
Advanced thermal packaging (double-sided cooling, copper pillar technology)