Sharp Vodafone 802SH, Service Manual

Page: 84 / 121

802SH
6 – 7
CONFIDENTIAL
IC620 VHIM1820XCP-1L (MAX1820XEBC): DCDC
IC630 RH-IX3045AFZZL (RF9266): W-CDMA POWER AMP.
Pin No. Terminal name Input/Output Description of terminal
1 /SKIP Input PWM/Skip-mode input
2 COMP – Compensation
3 OUT Input Output voltage sense input
4 REF Input External reference input
5 GND – Earth
6 PGND – Power earth
7 LX Output Inductor connection
8 BATT Input Supply voltage input
9 /SHDN Input Active-low, shutdown control input
10 SYNC Input Clock synchronisation input
Pin No. Terminal name
1 V CTRL (VREG)
2 V CTRL (VREG)
3 GND
4 VCC_BIAS
5 VCC_BIAS
6 GND
7 VCC DET
8 V DETECT
9 GND
10 RF OUT
11 GND
12 GND
13 GND
14 GND
15 VCC2
16 VCC2
17 GND
18 VCC1
19 VCC1
20 GND
21 RF IN
22 GND
23 GND
BATT
LX
PGND
GND
OUT
REF
COMP
SYNC /SKIP
/SHDN
TO
IC BIAS
VOLTAGE
REFERENCE
CLAMP
TRANSIMPEDANCE
ERROR AMP
ERROR
SIGNAL
SLOPE COMP
CURRENT
SENSE
PWM
COMPARATOR
SKIP
COMPARATOR
PWM
CONTROL
AND
SKIP LOGIC
SKIP
THRESHOLD
1 MHz
OSCILLATOR
+13 OR
+18
1.25 V
0.45
V
TO
2.15
V
8
5
3
4
2 1 9
6
7
10
19 18 16 17 15 14 13 12
1 2 4 3 5 6 7 8
20
21
22
11
10
9
Interstage MN
IMN OMN
Bias Control
Power
Detector
Network
VCC1 VCC1 VCC2 VCC2 GND GND
GND GND
GND GND
GND
RF IN
GND
GND
RF OUT
GND
VCTRL VCTRL
VCC
BIAS
VCC
BIAS
VCC
DET
VDET