SY20749BVLQ (SQ24390BVLQ)

Negative Charge Pump With Integrated Adjustable LDO

SY20749BVLQ Negative Charge Pump With Integrated Adjustable LDO Datasheet

Parameters
Features
Description

Part number	SY20749BVLQ
Vin (min) (V)	2.3
Vin (max) (V)	5.5
Current limit (A)	0.8A Charge Pump Current Limit
Switching frequency (min)(kHz)	500
Switching frequency (max)(kHz)	500
Vout (min) (V)	-Vin
Vout (max) (V)	0
Vref accuracy (±%)
Vout accuracy(±%)	2
Iq (typ) (uA)	1200
Features	OCP,OTP
Package	QFN1.4×1.8-10
Operating temperature range(°C)	-40 to 125
Functional safety category

Wide Input Voltage Range: 2.3V to 5.5V
Low Quiescent Current: 1.2mA
Output Current: Up to 200mA
No Inrush Current During Startup:
0.8A Charge Pump Current Limit (Typ.)
Overcurrent and Short-Circuit Protection
Dual Output:

o -1× Charge Pump

o Regulated Output Between 0V and -VIN

Compact Package: QFN 1.4mm×1.8mm

The SY20749 is a charge pump with a wide input voltage range of 2.3V to 5.5V. It provides an unregulated negative voltage equal to VIN and features an adjustable negative linear voltage regulator between 0V and the negative input voltage, which can deliver a maximum of 200 mA to a load.

The SY20749 does not require an inductor and uses only four ceramic capacitors as external components. It is available in a compact QFN 1.4mm×1.8mm package, ensuring a small PCB size and low BOM cost.