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PDF ADP3502 Data sheet ( Hoja de datos )
| Número de pieza | ADP3502 | |
| Descripción | CDMA Power Management System | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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a
CDMA Power Management System
ADP3502
FEATURES
11 LDOs Optimized for Specific CDMA Subsystems
4 Backup LDOs for Standby Mode Operation
Ultra Low Standby Supply Current
High Accuracy Battery Charger (0.7%)
3 Li-Ion Battery Charge Modes
5 mA Precharge
Low Current Charge
Full Current Charge
Integrated RTC
Ambient Temperature: –30؇C to +85؇C
64-Lead 7 mm ؋ 7 mm ؋ 1 mm TQFP Package
APPLICATIONS
CDMA/CDMA2000/PCS Handsets
GENERAL DESCRIPTION
The ADP3502 is a multifunction chip optimized for CDMA-1x
cell phone power management. It offers a total power solution
for the handset baseband and RF section, including LDOs to
power 11 subsystems. Also integrated are a real-time clock
(RTC), serial bus interface, and charging control for Li-Ion/
Li-Polymer batteries. Sophisticated controls are available for
power-up during battery charging, keypad interface, GPIO/INT
function, and RTC function.
The ADP3502 is optimized for CDMA handsets powered by
single-cell Li-Ion batteries. Its high level of integration sig-
nificantly reduces the design effort, number of discrete
components, and solution size/cost. The main-sub LDO
structure reduces the standby current consumption, and as a
result, greatly extends the standby time of the phone. System
operation has been proven to be fully compatible with
MSM51xx-based designs.
The ADP3502 comes in a 64-lead 7 mm × 7 mm × 1 mm
TQFP package and is specified over a wide temperature range of
–30°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
LOGIC
BLOCK
POWER ON
DELAY 10ms
KEYPAD I/F
GPIO
INTERRUPT
CONTROL
LDO
CONTROL
SERIAL I/F
RESET
32kHz OUTPUT
CONTROL
RESET
OUTPUT
RTC
COUNTER
STAY-ALIVE
TIMER
ANALOG
BLOCK
BATTERY
CHARGER
REFERENCE
LDO1 TO LDO11
VOLTAGE
DETECTOR
ADP3502
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties that
may result from its use. No license is granted by implication or otherwise
under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective companies.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
www.analog.com
Fax: 781/326-8703 © 2003 Analog Devices, Inc. All rights reserved.
1 page  
ADP3502
BATTERY VOLTAGE DIVIDER: MVBAT (TA = –30؇C to +85؇C, CVBAT = 10 F MLCC, CADAPTER = 1 F MLCC, unless
otherwise noted.)
Parameter
Symbol
Conditions
Min Typ Max Unit
MVBAT OUTPUT VOLTAGE
5-Bit Programmable
VMVBAT
MVBAT OUTPUT VOLTAGE
STEP
OUTPUT DRIVE CURRENT
CAPABILITY
MVBAT LOAD REGULATION
OPERATING BATTERY
CURRENT
SHUTDOWN CURRENT
VSTEP
IOUT
⌬MVBAT
VBAT = 4.35 V, MVEN = 1
TA = 25°C
Code: 10000
Code: 01111
VBAT = 4.35 V, MVEN = 1
0 < IOUT < 100 µA
VBAT = 4.35 V, MVEN = 1
VBAT = 4.35 V, MVEN = 0
2.459 2.508 2.538 V
2.648 2.697 2.732 V
6 mV/LSB
12
mA
35
78 97
mV
µA
1 µA
BATTERY CHARGER (TA = –30؇C to +85؇C, CVBAT = 10 F MLCC, CADAPTER = 1 F MLCC, 4.0 V Յ ADAPTER Յ 12 V, unless
otherwise noted.)
Parameter
CHARGER CONTROL VOLTAGE
RANGE
2-Bit Programmable
Symbol
VBAT
SENSE
CHARGER CONTROL VOLTAGE
RANGE1
2-Bit Programmable
VBAT
SENSE
CHARGER VOLTAGE
TEMPERATURE DRIFT1
CHARGER DETECT ON
THRESHOLD
CHARGER DETECT OFF
THRESHOLD
CHARGER SUPPLY CURRENT
CURRENT LIMIT THRESHOLD
High Current Limit
(Full Charge Current Enabled)
Low Current Limit
(Full Charge Current Disabled)
PRECHARGE CURRENT SOURCE
BASE PIN DRIVE CURRENT
DEEP DISCHARGE LOCK-OUT
(Releasing Voltage)
DEEP DISCHARGE LOCK-OUT
HYSTERESIS2
ISENSE BIAS CURRENT
ADAPTER-VBAT
ADAPTER-VBAT
IADAPTER
ADAPTER-VISNS
DDLO
IISNS
Conditions
TA = 25°C
VR_SENSE = 30 mV, CHI = 1
4.8 V ≤ ADAPTER ≤ 12 V
Code: 00 (Default)
Code: 01
Code: 10
Code: 11
TA = –20°C to +55°C
VR_SENSE = 160 mV, CHI = 1
4.8 V ≤ ADAPTER ≤ 12 V (Note 1)
Code: 00 (Default)
Code: 01
Code: 10
Code: 11
+25°C to +55°C or +25°C to –20°C
VR_SENSE = 30 mV, Constant Adapter
Voltage between 4.8 V and 12 V
Min Typ Max Unit
3.440
4.175
4.195
4.215
3.500 3.560
4.205 4.235
4.225 4.255
4.245 4.275
V
V
V
V
3.440
4.155
4.175
4.195
–20
3.500 3.560
4.205 4.255
4.225 4.275
4.245 4.295
+20
V
V
V
V
mV
110 165 225 mV
0
25 60
mV
ADAPTER = 5 V, VBAT = 4.3 V
ADAPTER = 5 V
VBAT = 3.6 V
VBAT = 3.0 V
2 mA
170 210 255 mV
40 60 75 mV
VBAT ≤ DDLO
VBAT< DDLO, TA = 25°C,
(5 mA Precharge), VBAT Ramping Up
3
20
57
35
2.650 2.80
mA
mA
V
VISNS = 5 V
100 200
1
mV
µA
REV. 0
–5–
5 Page 
ADP3502
PIN FUNCTION DESCRIPTION (continued)
Pin
No. Mnemonic
54 BVS
I/O Supply
55 NRCAP
O VBAT
56 AGND
57 MVBAT
O VBAT
58 BASE
O ADAPTER
59 ADAPTER
60 ADPSUPPLY I ADAPTER
61 ISENSE
I ADAPTER
62 PWRONKEY– I VBAT
63 OPT1–
I VBAT
64 OPT2–
I/O VBAT
Function
Battery voltage sense input for charger. Connect to battery with a separate low current
trace
Noise reduction capacitor, 0.1 µF MLCC
Analog Ground
Battery voltage divider output. Buffered internally. Connect to baseband ADC.
Base drive output for PNP pass transistor
AC Adapter Input
Supply bias current to charging related blocks
Charge current sense input
Power ON/OFF key input. Pulled up internally with 140 kΩ.
Optional power ON input. ADP3502 will keep power on when this pin goes low.
Optional power ON input. ADP3502 will keep power on when this pin goes low.
While the part is powered up, the input is pulled low (GND) internally. Do not con-
nect to any supply or signal source.
REV. 0
–11–
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ADP3502.PDF ] | |
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