REG71050 Datasheet, PDF (1/32 Pages) Texas Instruments – Buck-Boost Charge Pump

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REG71050, REG71055, REG710
SBAS221H – DECEMBER 2001 – REVISED OCTOBER 2015
REG710xx Buck-Boost Charge Pump with up to 60-mA Output Current
1 Features
•1 Wide Input Voltage Range: 1.8 V to 5.5 V
• Automatic Step-Up and Step-Down Operation
• Low Input Current Ripple
• Low Output Voltage Ripple
• Minimum Number of External Components—No
Inductors
• 1-MHz Internal Oscillator Allows Small Capacitors
• Shutdown Mode
• Thermal and Current Limit Protection
• Six Fixed Output Voltages Available:
– 2.5 V, 2.7 V, 3 V, 3.3 V, 5 V, 5.5 V
2 Applications
• White LED Driver
• Smart Card Readers
• SIM Cards
• Handheld devices
• Modems
• PCMCIA Cards
• LCD Displays
• Battery Backup Supplies
3 Description
The REG710 family of devices are switched capacitor
voltage converters that generate regulated, low-ripple
output voltage from an unregulated input voltage. A
wide input supply voltage from 1.8 V to 5.5 V makes
the REG710 family of devices ideal for a variety of
battery sources, such as single-cell Li-Ion, or 2-cell
and 3-cell nickel-based or alkaline-based chemistries.
The input voltage may vary above and below the
output voltage and the output remains in regulation.
The device works as step-up or step-down converters
without the need of an inductor, providing low EMI
DC-DC conversion. The high switching frequency
allows the use of small surface-mount capacitors,
saving board space and reducing cost. The REG710
device is thermally protected and current limited,
protecting the load and the regulator during fault
conditions. Typical ground pin current (quiescent
current) is 65 μA with no load, and less than 1 μA in
shutdown mode.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
REG710
SOT-23 (6)
2.90 mm × 1.60 mm
REG71050
SOT (6)
SON (6)
2.90 mm × 1.60 mm
2.00 mm × 2.00 mm
REG71055
SOT-23 (6)
2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
spacing
Typical Operating Circuit
C_PUMP
0.22mF
Enable ₃ ⁴
6
V_IN
5
1
C_IN
2.2mF
REG710
V_OUT
C_OUT
2.2mF
2 GND
Efficiency vs Load Current
90
V_IN = 2.7V
80
V_IN = 3V
V_IN = 3.3V
70
V_IN = 3.6V
60
V_IN = 4.2V
50
V_IN = V_OUT
40
30
0.1
1
10
100
Load Current (mA)
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.