The REG710 is a switched capacitor voltage converterthat produces a regulated, low-ripple output voltage from an unregulated input voltage

REG710-27

Manufacturer Part NumberREG710-27
DescriptionThe REG710 is a switched capacitor voltage converterthat produces a regulated, low-ripple output voltage from an unregulated input voltage
ManufacturerTexas Instruments
REG710-27 datasheet
 


Specifications of REG710-27

Iout(max)(a)0.03Iq(typ)(ma)0.065
Switching Frequency(max)(khz)1000Vin(min)(v)1.8
Vin(max)(v)5.5Vout(min)(v)2.7
Vout(max)(v)2.7Preset Vout(v)2.7
Efficiency(typ)(%)90TopologyBuck-Boost
Operating Temperature Range(c)-40 to 85Pin/package6SOT-23
Regulated Outputs(#)1  
1
Page 1
2
Page 2
3
Page 3
4
Page 4
5
Page 5
6
Page 6
7
Page 7
8
Page 8
9
Page 9
10
Page 10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Page 8/26

Download datasheet (2Mb)Embed
PrevNext
REG710
SBAS221G – DECEMBER 2001 – REVISED JANUARY
The REG710 regulated charge pump provides a
regulated output voltage for input voltages ranging
from less than the output to greater than the output.
This is accomplished by automatic mode switching
within the device. When the input voltage is greater
than the required output, the unit functions as a
variable
frequency
switch-mode
operation is shown in
Figure
18. Transistors Q
Q
are held off, Q
is on, and Q
3
4
needed to maintain a regulated output voltage.
When the input voltage is less than the required
output voltage, the device switches to a step-up or
boost mode of operation, as shown in
A conversion clock of 50% duty cycle is generated.
During the first half cycle the FET switches are
configured as shown in
Figure
charges to V
.
IN
V
IN
Figure 18. Simplified Schematic of the REG710 Operating in the Step-Down Mode
V
IN
Q
1
OFF
C
PUMP
Q
3
ON
C
IN
(A)
Figure 19. Simplified Schematic of the REG710 Operating in the Step-Up or Boost Mode
8
Submit Documentation Feedback
2009...........................................................................................................................................
THEORY OF OPERATION
During the second half cycle the FET switched are
configured as shown in
on C
is added to V
PUMP
regulated by skipping clock cycles as necessary.
PEAK CURRENT REDUCTION
regulator.
This
In normal operation, the charging of the pump and
and
output capacitors usually leads to relatively high peak
1
is switched as
input currents which can be much higher than that of
2
the average load current. The regulator incorporates
circuitry to limit the input peak current, lowering the
total EMI production of the device and lowering
output voltage ripple and input current ripple. Input
Figure
19.
capacitor (C
by input current peaks.
19A, and C
PUMP
Q
Q
1
2
OFF
SWITCHED
C
PUMP
Q
Q
3
4
OFF
ON
C
IN
C
Step-Down (Buck) Mode
V
IN
Q
2
ON
ON
Q
4
OFF
OFF
C
IN
V
OUT
C
OUT
Step-Up (Boost) Mode
Product Folder Link(s):
REG710
www.ti.com
Figure
19B, and the voltage
. The output voltage is
IN
) supplies most of the charge required
IN
V
OUT
OUT
Q
Q
1
2
OFF
C
PUMP
Q
Q
3
4
ON
V
OUT
C
OUT
(B)
Copyright © 2001–2009, Texas Instruments Incorporated