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 ≤ TA ≤ 85°C, 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, or 2.4V to 3.0V and -40°C ≤ TA ≤ 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
Description
Min
4.75
Typ
5.0
Max
5.25
Units
Notes
a
V
V
V
I
5V Output Voltage from Pump
V
V
V
Configuration of footnote. Average, neglecting
PUMP5V
ripple. SMP trip voltage is set to 5.0V.
a
3.3V Output Voltage from Pump
2.6V Output Voltage from Pump
Available Output Current
3.00
2.45
3.25
2.55
3.60
2.80
Configuration of footnote. Average, neglecting
PUMP3V
PUMP2V
ripple. SMP trip voltage is set to 3.25V.
a
Configuration of footnote. Average, neglecting
ripple. SMP trip voltage is set to 2.55V.
a
Configuration of footnote.
PUMP
V
V
V
= 1.8V, V
= 1.5V, V
= 1.3V, V
= 5.0V
5
8
8
–
–
–
–
–
–
mA
mA
mA
SMP trip voltage is set to 5.0V.
SMP trip voltage is set to 3.25V.
SMP trip voltage is set to 2.55V.
BAT
BAT
BAT
PUMP
PUMP
PUMP
= 3.25V
= 2.55V
a
V
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)
1.8
1.0
1.0
1.2
–
–
–
–
–
5
5.0
3.3
2.8
–
V
Configuration of footnote. SMP trip voltage is
set to 5.0V.
BAT5V
a
V
V
V
V
Configuration of footnote. SMP trip voltage is
BAT3V
set to 3.25V.
a
V
Configuration of footnote. SMP trip voltage is
BAT2V
set to 2.55V.
a
o
V
Configuration of footnote. 0 C ≤ T ≤ 100.
BATSTART
A
o
1.25V at T = -40 C.
A
a
∆V
∆V
∆V
–
%V
Configuration of footnote.
V is the “Vdd Value
O
PUMP_Line
PUMP_Load
PUMP_Ripple
O
O
for PUMP Trip” specified by the VM[2:0] setting
in the DC POR and LVD Specification, Table 3-
13 on page 22.
a
Load Regulation
–
5
–
%V
Configuration of footnote.
V is the “Vdd Value
O
for PUMP Trip” specified by the VM[2:0] setting
in the DC POR and LVD Specification, Table 3-
13 on page 22.
a
Output Voltage Ripple (depends on cap/load)
Efficiency
–
100
50
–
–
mVpp
%
Configuration of footnote. Load is 5 mA.
a
E
3
35
Configuration of footnote. Load is 5 mA. SMP
trip voltage is set to 3.25V.
E
2
Efficiency
35
80
–
%
For I load = 1mA, V
= 2.55V, V
= 1.3V,
PUMP
BAT
10 uH inductor, 1 uF capacitor, and Schottky
diode.
F
Switching Frequency
Switching Duty Cycle
–
–
1.3
50
–
–
MHz
%
PUMP
DC
PUMP
a. L1 = 2 µH inductor, C1 = 10 µF capacitor, D1 = Schottky diode. See Figure 3-2.
Figure 3-2. Basic Switch Mode Pump Circuit
D1
Vdd
VPUMP
L1
SMP
Vss
+
C1
VBAT
Battery
PSoC
January 12, 2007
Document No. 38-12025 Rev. *K
21
[+] Feedback
CYPRESS [ CYPRESS ]
