CY8C21x34 Final Data Sheet
3. Electrical Specifications
3.3.5
DC Switch Mode Pump Specifications
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and -40°C
≤
T
A
≤
85°C, 3.0V to 3.6V and -40°C
≤
T
A
≤
85°C, or 2.4V to 3.0V and -40°C
≤
T
A
≤
85°C, respectively. Typical parameters
apply to 5V, 3.3V, or 2.7V at 25°C and are for design guidance only.
Table 3-11. DC Switch Mode Pump (SMP) Specifications
Symbol
V
PUMP5V
V
PUMP3V
V
PUMP2V
I
PUMP
Description
5V Output Voltage from Pump
3.3V Output Voltage from Pump
2.6V Output Voltage from Pump
Available Output Current
V
BAT
= 1.8V, V
PUMP
= 5.0V
V
BAT
= 1.5V, V
PUMP
= 3.25V
V
BAT
= 1.3V, V
PUMP
= 2.55V
V
BAT5V
V
BAT3V
V
BAT2V
V
BATSTART
∆V
PUMP_Line
Input Voltage Range from Battery
Input Voltage Range from Battery
Input Voltage Range from Battery
Minimum Input Voltage from Battery to Start Pump
Line Regulation (over Vi range)
5
8
8
1.8
1.0
1.0
1.2
–
–
–
–
–
–
–
–
5
–
–
–
5.0
3.3
2.8
–
–
mA
mA
mA
V
V
V
V
%V
O
Min
4.75
3.00
2.45
Typ
5.0
3.25
2.55
Max
5.25
3.60
2.80
V
V
V
Units
Notes
Configuration of footnote.
a
Average, neglecting
ripple. SMP trip voltage is set to 5.0V.
Configuration of footnote.
a
Average, neglecting
ripple. SMP trip voltage is set to 3.25V.
Configuration of footnote.
a
Average, neglecting
ripple. SMP trip voltage is set to 2.55V.
Configuration of footnote.
a
SMP trip voltage is set to 5.0V.
SMP trip voltage is set to 3.25V.
SMP trip voltage is set to 2.55V.
Configuration of footnote.
a
SMP trip voltage is
set to 5.0V.
Configuration of footnote.
a
SMP trip voltage is
set to 3.25V.
Configuration of footnote.
a
SMP trip voltage is
set to 2.55V.
Configuration of footnote.
a
0
o
C
≤
T
A
≤
100.
1.25V at T
A
= -40
o
C.
Configuration of footnote.
a
V
O
is the “Vdd Value
for PUMP Trip” specified by the VM[2:0] setting
in the DC POR and LVD Specification,
Configuration of footnote.
a
V
O
is the “Vdd Value
for PUMP Trip” specified by the VM[2:0] setting
in the DC POR and LVD Specification,
Configuration of footnote.
a
Load is 5 mA.
Configuration of footnote.
a
Load is 5 mA. SMP
trip voltage is set to 3.25V.
For I load = 1mA, V
PUMP
= 2.55V, V
BAT
= 1.3V,
10 uH inductor, 1 uF capacitor, and Schottky
diode.
∆V
PUMP_Load
Load Regulation
–
5
–
%V
O
∆V
PUMP_Ripple
E
3
E
2
Output Voltage Ripple (depends on cap/load)
Efficiency
Efficiency
–
35
35
100
50
80
–
–
–
mVpp
%
%
F
PUMP
DC
PUMP
Switching Frequency
Switching Duty Cycle
–
–
1.3
50
–
–
MHz
%
a. L
1
= 2
µ
H inductor, C
1
= 10
µ
F capacitor, D
1
= Schottky diode. See Figure 3-2.
Figure 3-2. Basic Switch Mode Pump Circuit
D1
Vdd
V
PUMP
L
1
V
BAT
+
SMP
Battery
PSoC
Vss
C1
January 12, 2007
Document No. 38-12025 Rev. *K
21
CYPRESS [ CYPRESS SEMICONDUCTOR ]
