LM2770
www.ti.com
SNVS318E – NOVEMBER 2004 – REVISED MAY 2013
LM2770 High Efficiency Switched Capacitor Step-Down DC/...
LM2770
www.ti.com
SNVS318E – NOVEMBER 2004 – REVISED MAY 2013
LM2770 High Efficiency Switched Capacitor Step-Down DC/DC
Regulator with Sleep Mode
Check for Samples: LM2770
FEATURES
1
2 High Efficiency Multi-Gain Architecture: Peak Power Efficiency >85%
Output Voltage Pairs: 1.2V/1.5V and 1.2V/1.575V
Dynamic Output Voltage Selection ±3% Output Voltage Accuracy Output Currents up to 250mA 2.7V to 5.5V Input Range Low-Supply-Current Sleep Mode 55µA Quiescent Supply Current in Full-Power
Mode Soft-Start Short-Circuit Protection in Full-Power Mode Current-Limit Protection in Sleep Mode WSON-10 Package (3mm × 3mm × 0.8mm)
APPLICATIONS
DSP Power Supplies
Baseband Power Supplies
Mobile Phones and Pagers
Portable Electronic Equipment
DESCRIPTION
The LM2770 is a switched capacitor step-down
regulator that is ideal for powering low-voltage applications in portable systems. The LM2770 can supply load currents up to 250mA and operates over an input voltage range of 2.7V to 5.5V. This makes the LM2770 a great choice for systems powered by 1-cell Li-Ion batteries and chargers. The output voltage of the LM2770 can be dynamically switched between two output levels with a logic input pin. Output voltage pairs currently available include 1.2V/1.5V and 1.2V/1.575V. Other pairs of voltage options can be developed upon request.
Typical Application Circuit
VIN = 2.7V to 5.5V
9
CIN 10 PF
LM2770
VIN VOUT
VOUT :1.2V/1.5V or 1.2V/1.575V
Dynamic scaling w/ VSEL IO...