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參數資料
| 型號： | ADP3502 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | CDMA Power Management System |
| 中文描述： | CDMA的電源管理系統 |
| 文件頁數： | 16/36頁 |
| 文件大小： | 714K |
| 代理商： | ADP3502 |
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REV. 0
–16–
ADP3502
THEORY OF OPERATION
As illustrated in the Functional Block Diagram, the ADP3502
can be divided into two high level blocks—analog and logic.
The analog block consists mainly of LDO regulators, a battery
charger, reference voltage, and voltage detector subblocks, all of
which are powered by the main battery or the charging adapter.
On the other hand, VBAT powers all the logic subblocks
except the RTC counter, 32 kHz output control, RESET
output, and stay-alive timer. The RTCV pin powers these
subblocks (see the shaded area of Figure 2).
ANALOG BLOCKS
Low Drop-Out (LDO) Regulators
There are four sub-LDOs for LDO1, LDO2, LDO3, and LDO6,
in order to meet low power consumption at light load (standby
operation). They are used at low load condition, but they are
continuously on even if each of the main LDOs are on. LDO3 and
LDO3b are used for the coin cell, and LDO3b is always on until
the main battery (VBAT) is decreased to 2.5 V, the DDLO
threshold. LDO7 and LDO9 are gated by a control signal
from SLEEP or register setting of SLEEP7/SLEEP9. LDO4 and
LDO11 are initially on. For details of LDO on/off control, refer
to the LDO Control section.
POWER ON
5
KEYPAD I/F
4
GPIO
3
SERIAL I/F
2
RESET
1
[VBAT]
DELAY 10ms
6
INTERRUPT
CONTROL
7
LDO CONTROL
8
ANALOG
BLOCK
32K OUTPUT
CONTROL
[RTCV]-RTC BLOCK
RTC COUNTER
9
RESET OUTPUT
10
STAY-ALIVE TIMER
11
Figure 2. Power Partitioning of Subblocks
Table I. Ground Currents of LDOs with Each Handset Operation
Total
LDO
IGND
Baseband Baseband Coin
VDD
Core
Baseband RF
AVDD
RF
Tx
RF
Rx2
RF
Option Option REF
Main
LDO Names
Cell
Audio
Vibrator
Rx1
LDO Number
1
6
3
4
5
2
7
8
9
10
11
Power OFF
OFF
OFF
10
μ
A
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
20
μ
A
30
μ
A
Light Load
10
μ
A
5
μ
A
10
μ
A
OFF
OFF
5
μ
A
OFF
OFF
OFF
OFF
OFF
20
μ
A
50
μ
A
Midload
60
μ
A
55
μ
A
60
μ
A
OFF
OFF
55
μ
A
OFF
OFF
OFF
OFF
OFF
20
μ
A
250
μ
A
Active Load 60
μ
A
55
μ
A
60
μ
A
OFF
OFF
55
μ
A
80
μ
A
80
μ
A
80
μ
A
80
μ
A
OFF
20
μ
A
570
μ
A
Talk
60
μ
A
55
μ
A
60
μ
A
55
μ
A
OFF
55
μ
A
80
μ
A
80
μ
A
80
μ
A
80
μ
A
80
μ
A
20
μ
A
675
μ
A
Ring
60
μ
A
55
μ
A
60
μ
A
55
μ
A
69 mA
55
μ
A
80
μ
A
80
μ
A
80
μ
A
80
μ
A
80
μ
A
20
μ
A
744
μ
A
Standby
Mode
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相關代理商/技術參數 |
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| ADP3510ARU | 制造商:AD 制造商全稱:Analog Devices 功能描述:CDMA Power Management System |
| ADP3510ARU-REEL7 | 制造商:Analog Devices 功能描述: |
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