TS6001
PIN FUNCTIONS
PIN
1
2
3
NAME
IN
OUT
GND
FUNCTION
Supply Voltage Input
+2.5V Output
Ground
DESCRIPTION/THEORY OF OPERATION
The TS6001 incorporates a precision 1.25-V
bandgap reference that is followed by an output
amplifier configured to amplify the base bandgap
output voltage to a 2.5-V output. The design of the
bandgap reference incorporates proprietary circuit
design techniques to achieve its low temperature
coefficient of 7ppm/°C and initial output voltage
accuracy less than 0.08%. The design of the output
amplifier’s frequency compensation does not require
a separate compensation capacitor and is stable
with capacitive loads up to 2200pF. The design of
the output amplifier also incorporates low headroom
design as it can source and sink load currents to
500μA with a dropout voltage less than 100mV.
APPLICATIONS INFORMATION
Power Supply Input Bypass Capacitance
If there are other analog ICs within 1 to 2 inches of
the TS6001 with their own bypass capacitors to
GND, the TS6001 would not then require its own
bypass capacitor. If this is not the case, then it is
considered good analog circuit engineering practice
to place a 0.1µF ceramic capacitor in as close
proximity to the TS6001 as practical with very short
pcb track lengths.
Output/Load Capacitance Considerations
As mentioned previously, the TS6001 does not
require a separate, external capacitor at V
OUT
for
transient response stability as it is stable for
capacitive loads up to 2200pF. For improved load
regulation transient response, the use of a capacitor
at V
OUT
helps to reduce output voltage
overshoot/undershoot to transient load current
conditions. Figure 1 illustrates the TS6001’s
transient load regulation performance with C
LOAD
=
0pF to a 50-µA transient upon a 175-µA steady-state
load current. Peak transients are approximately
20mV and the TS6001 settles in less than 8µs. As
shown in Figure 2, adding a capacitive load reduces
peak transients at the expense of settling time. In
this case, the TS6001’s output was loaded with
C
LOAD
= 1000pF and subjected to the same transient
load current profile. Peak transients were reduced to
less than 10mV and the TS6001 settled in less than
10µs.
I
OUT
= 175µA
→
225µA
→
175µA
I
OUT
50µA/DIV
I
OUT
50µA/DIV
I
OUT
= 175µA
→
225µA
→
175µA
OUTPUT
20mV/DIV
Figure 1:
TS6001 Transient Load Regulation
Response, C
LOAD
= 0pF
OUTPUT
20mV/DIV
Figure 2:
TS6001 Transient Load Regulation
Response, C
LOAD
= 1000pF
TS6001DS r1p0
Page 7
RTFDS
TOUCHSTONE [ TOUCHSTONE SEMICONDUCTOR INC ]
