Cypress CY8C21434 Manual De Usuario

Document Number: 38-12025  Rev. *O

Page 23 of 45

ΔV

PUMP_

Line

Line Regulation (over Vi range)

–

5

–

%V

O

Configuration of footnote.

 V

O

 

is the “Vdd Value for PUMP 

Trip” specified by the VM[2:0] 

setting in the DC POR and LVD 

Specification, 

ΔV

PUMP_

Load

Load Regulation

–

5

–

%V

O

Configuration of footnote.

 V

O

 

is the “Vdd Value for PUMP 

Trip” specified by the VM[2:0] 

setting in the DC POR and LVD 

Specification, 

ΔV

PUMP_

Ripple

Output Voltage Ripple (depends on cap/load)

–

100

–

mVpp

Configuration of footnote.

 

Load is 5 mA.

E

3

Efficiency

35

50

–

%

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

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

–

%

Table 21.  DC Switch Mode Pump (SMP) Specifications  (continued)

Battery

C1

D1

+

Vdd

Vss

SMP

V

BAT

L

1

V

PUMP

6. L

1

 = 2 mH inductor, C

1

 = 10 mF capacitor, D

1

 = Schottky diode. See Figure 15

.