GSM Cellular/PCN Handset RF Power

Management IC

8

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Pin Description

PIN

NAME

FUNCTION

1

R3EN

Regulator R3 Enable Input

2

PCEN

Op Amp and Band Switch Mux Enable Input

3

PC1+

Op Amp 1 Noninverting Input

4

PC1-

Op Amp 1 Inverting Input

5

PC1OUT

Op Amp 1 Output

Op Amp Power Supply

7

PC2OUT

Op Amp 2 Output

8

PC2-

Op Amp 2 Inverting Input

9

PC2+

Op Amp 2 Noninverting Input

10

PCNAPC

Band Switch PCN Output. Normally connected to PCN PA APC. Internally shorts to ground when

not selected.

11

BANDSWIN

Band Switch Input. Normally connected to PC2OUT.

12

GSMAPC

Band Switch GSM Output. Normally connected to GSM PA APC. Internally shorts to ground when

not selected.

13

GSM/PCN

Band Switch Control Input. With logic high, BANDSWIN is connected to GSMAPC. With logic low,

BANDSWIN is connected to PCNAPC.

14

R1EN

Regulator R1 Enable Input

15

R2EN

Regulator R2 Enable Input

16

R2OUT

Output of Linear Regulator 2. 50mA output current. Use 1

µF low ESR bypass capacitor to GND.

17

Regulator Power Supply

18

R1OUT

Output of Linear Regulator 1. 100mA output current. Use 1

µF low ESR bypass capacitor to GND.

19

R3BYP

Output of Linear Regulator 4. Power supply for regulator R3 and 1.25V reference. Use 1

µF low ESR

bypass capacitor to GND.

20

R3OUT

Output of Linear Regulator 3. 20mA output current. Use 1

µF low ESR bypass capacitor to GND.

21

VCOOUT

Switched R3 Output

22

ENVCO

VCO Switch Control Input. With logic high, VCOOUT is connected to R3OUT. With logic low,

VCOOUT is high impedance.

23

CBYP

1.25V Voltage Reference Bypass Pin. Connect low-leakage, 0.01

µF bypass capacitor to GND to

minimize noise at the output.

24

GND

Ground