Features and Benefits
- Input voltage: 2.7 V to 16 V
- Maximum output current: −100 mA
- Integrated power MOSFETs
- Four LDO selectable output voltage options
- −0.505 V, −1.5 V, −2.5 V, −5 V
- Adjustable output voltage range: −0.505 V to –VIN + 0.5 V
- Programmable charge pump switching frequency range
- 100 kHz to 1 MHz
- Frequency synchronization via SYNC pin
- Precision enable and power good
- Internal soft start
- Output short-circuit and overload protection
- Shorted charge pump fly capacitor protection
- Integrated LDO output discharge resistor
- 16-lead, 4 mm × 4 mm LFCSP
The ADP5600 is an interleaved charge pump inverter with an integrated, negative, low dropout (LDO) linear regulator. The interleaved charge pump inverter exhibits reduced output voltage ripple and reflected input current noise over conventional inductive or conventional capacitive based solutions. The integrated LDO provides a rail with good regulation at sufficient power supply rejection ratio (PSRR).
The ADP5600 charge pump operates via resistor programming or external clock synchronization at switching frequency range of 100 kHz to 1 MHz. Operating at a higher switching frequency allows the use of small input, output, and fly capacitors. To combine the high switching frequency with internal field effect transistors (FETs), compensation, and soft start gives a best-in-class total solution size for negative rail generation.
The ADP5600 also features comprehensive fault protection for robust applications. These protections include overload protection, shorted fly capacitor protection, undervoltage lockout (UVLO), and thermal shutdown. For easy sequencing, the ADP5600 has a power-good pin.
The integrated LDO of the ADP5600 uses an advanced proprie-tary architecture to provide high power supply rejection. It also achieves decent line and load transient response with only a small 2.2 μF ceramic output capacitor. The output can be configured via the SEL1 and SEL2 pins to one of four fixed output voltages and is adjustable from −0.505 V to –VIN + 0.5 V via an external feedback divider.
- Powering the negative rail on bipolar/split supply ADC/DAC/AMP/mux applications
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
The ADP5600CP-EVALZ evaluation board demonstrates the functionality of the ADP5600 interleaved inverting charge pump and a negative low dropout regulator (LDO).
The ADP5600CP-EVALZ evaluates simple device measurements such as line regulation, load regulation, and efficiency. Board features includes configuration of the LDO regulator output using SELx jumpers and synchronization of the operating frequency to the external clock.
A full description of the ADP5600 is available in the ADP5600 data sheet and should be consulted when using this evaluation board.
Technical Articles (2)
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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