CY8C21634/CY8C21534
CY8C21434/CY8C21334/CY8C21234
Document Number: 38-12025 Rev. *Q Page 23 of 45
DC Switch Mode Pump Specifications
Table 19 lists the 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 19. DC Switch Mode Pump (SMP) Specifications
Symbol Description Min Typ Max Units Notes
V
PUMP5V
5V Output Voltage from Pump 4.75 5.0 5.25 V Configuration of footnote.
[6]
Average, neglecting ripple.
SMP trip voltage is set to 5.0V.
V
PUMP3V
3.3V Output Voltage from Pump 3.00 3.25 3.60 V Configuration of footnote.
[6]
Average, neglecting ripple.
SMP trip voltage is set to 3.25V.
V
PUMP2V
2.6V Output Voltage from Pump 2.45 2.55 2.80 V Configuration of footnote.
[6]
Average, neglecting ripple.
SMP trip voltage is set to 2.55V.
I
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
5
8
8
–
–
–
–
–
–
mA
mA
mA
Configuration of footnote.
[6]
SMP trip voltage is set to 5.0V.
SMP trip voltage is set to 3.25V.
SMP trip voltage is set to 2.55V.
V
BAT5V
Input Voltage Range from Battery 1.8 – 5.0 V Configuration of footnote.
[6]
SMP trip voltage is set to 5.0V.
V
BAT3V
Input Voltage Range from Battery 1.0 – 3.3 V Configuration of footnote.
[6]
SMP trip voltage is set to 3.25V.
V
BAT2V
Input Voltage Range from Battery 1.0 – 2.8 V Configuration of footnote.
[6]
SMP trip voltage is set to 2.55V.
V
BATSTA
RT
Minimum Input Voltage from Battery to Start
Pump
1.2 – – V Configuration of footnote.
[6]
0
o
C ≤ T
A
≤ 100. 1.25V at T
A
=
-40
o
C.
ΔV
PUMP_
Line
Line Regulation (over Vi range) – 5 – %V
O
Configuration of footnote.
[6]
V
O
is the “Vdd Value for PUMP
Trip” specified by the VM[2:0]
setting in the DC POR and LVD
Specification, Table 21 on page
25.
ΔV
PUMP_
Load
Load Regulation – 5 – %V
O
Configuration of footnote.
[6]
V
O
is the “Vdd Value for PUMP
Trip” specified by the VM[2:0]
setting in the DC POR and LVD
Specification, Table 21 on page
25.
ΔV
PUMP_
Ripple
Output Voltage Ripple (depends on cap/load) – 100 – mVpp Configuration of footnote.
[6]
Load is 5 mA.
E
3
Efficiency 35 50 – % Configuration of footnote.
[6]
Load is 5 mA. SMP trip voltage
is set to 3.25V.
E
2
Efficiency 35 80 – % For I load = 1mA, V
PUMP
=
2.55V, V
BAT
= 1.3V,
10 uH inductor, 1 uF capacitor,
and Schottky diode.
F
PUMP
Switching Frequency – 1.3 – MHz
DC
PUMP
Switching Duty Cycle – 50 – %
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