E12604

Power Management IC for Security Camera System
CXA3840WR
Description
CXA3840WR is the power management IC for security camera system.
CXA3840WR has the optimized configuration for CCTV security camera system with CCD image sensor. The basic power
stages required in CCTV security camera can be formed by CXA3840WR without any other ICs.
Features
◆
Wide input voltage range
◆
Multiple output power supply for CCTV security camera system

:
7 V to 25 V
Switching Regulator :
1 ch

Internal MOSFET switch

1 MHz High switching frequency

LDO Regulator

Charge pump driver :

Voltage monitor

Output sequence control

: 5 ch
2 ch
: 2 ch (output)
secure DSP&AFE&CCD operation
◆
Thermal shut down
◆
Over current protections
Package
QFN 24 pin ( 4 mm × 4 mm )
1
CXA3840WR
Contents
Description -------------------------------------------------------------------------------------------------------------------------------------------- 1
Features ----------------------------------------------------------------------------------------------------------------------------------------------- 1
Package ----------------------------------------------------------------------------------------------------------------------------------------------- 1
Contents ----------------------------------------------------------------------------------------------------------------------------------------------- 2
Block Diagram---------------------------------------------------------------------------------------------------------------------------------------- 3
Absolute Maximum Ratings ----------------------------------------------------------------------------------------------------------------------- 4
Recommended Operating Conditions ----------------------------------------------------------------------------------------------------------- 5
Typical Application----------------------------------------------------------------------------------------------------------------------------------- 5
Electrical Characteristics --------------------------------------------------------------------------------------------------------------------------- 6
1.
Current Consumption (VIN) ------------------------------------------------------------------------------------------------------------- 6
2.
Charge Pump Circuit --------------------------------------------------------------------------------------------------------------------- 6
3.
Switching Regulator ---------------------------------------------------------------------------------------------------------------------- 7
4.
LDO 1 --------------------------------------------------------------------------------------------------------------------------------------- 8
5.
LDO 2 --------------------------------------------------------------------------------------------------------------------------------------- 8
6.
LDO 3 --------------------------------------------------------------------------------------------------------------------------------------- 8
7.
Voltage Monitor---------------------------------------------------------------------------------------------------------------------------- 9
8.
LDO 4 --------------------------------------------------------------------------------------------------------------------------------------- 9
9.
LDO 5 --------------------------------------------------------------------------------------------------------------------------------------- 9
10.
Voltage Selector --------------------------------------------------------------------------------------------------------------------------10
11.
VH and VL Output Voltage Settings --------------------------------------------------------------------------------------------------10
Sequence -------------------------------------------------------------------------------------------------------------------------------------------- 11
1.
Start-up ------------------------------------------------------------------------------------------------------------------------------------ 11
2.
Stop -----------------------------------------------------------------------------------------------------------------------------------------12
3.
Thermal shut down and recovery -----------------------------------------------------------------------------------------------------13
Pin Configuration -----------------------------------------------------------------------------------------------------------------------------------14
Pin Description --------------------------------------------------------------------------------------------------------------------------------------14
Package Outline ------------------------------------------------------------------------------------------------------------------------------------15
Marking -----------------------------------------------------------------------------------------------------------------------------------------------16
2
CXA3840WR
VSEL2
SW
NC
VIN
VH
VH_IN
Block Diagram
24
23
22
21
20
19
LDO4
FB
1
to
LDO4,5
LDO_IN1
REF
SW
REG
TSD
OSC
LDO1
3
Vo2
4
LDO_IN2
5
VSEL1
17
C1P
16
C1N
15
PGND
14
C2P
13
C2N
UVLO
2
Vo1
18
1/N
LDO2
CONTROL
LOGIC
CP
LDO3
6
VM2
VM1
Delay
Delay
3
9
10
11
12
VL_IN
GND
VCP
8
VL
7
VM1
LDO5
VM2
Vo3
CXA3840WR
Absolute Maximum Ratings
Parameters
Symbol
Maximum Ratings
Unit
Power Supply Voltage
VVIN
- 0.3 to 28
V
Feedback Voltage
VFB
- 0.3 to 6
V
LDO_IN1 Voltage
VLDO_IN1
- 0.3 to 6
V
LDO_IN2 Voltage
VLDO_IN2
- 0.3 to 6
V
Vo1 Voltage
VVo1
- 0.3 to 6
V
Vo2 Voltage
VVo2
- 0.3 to 6
V
Vo3 Voltage
VVo3
- 0.3 to 6
V
VM1 Voltage
VVM1
- 0.3 to 6
V
VM2 Voltage
VVM2
- 0.3 to 6
V
VL_IN Voltage
VVL_IN
- 17 to 0.3
V
VL Voltage
VVL
- 10 to 0.3
V
VCP Voltage
VVCP
- 0.3 to 6
V
C1P Voltage
VC1P
- 0.3 to 6
V
C2P Voltage
VC2P
- 0.3 to 6
V
C1N Voltage
VC1N
- 0.3 to 6
V
C2N Voltage
VC2N
- 0.3 to 6
V
VSEL1 Voltage
VVSEL1
- 0.3 to 6
V
VSEL2 Voltage
VVSEL2
- 0.3 to 6
V
VH_IN Voltage
VVH_IN
- 0.3 to 28
V
VH Voltage
VVH
- 0.3 to 17
V
SW terminal Voltage
VSW
- 0.3 to 30
V
Power Dissipation
PD
*1
2100 *1
mW
Operation Temperature
Ta
- 20 to +75
˚C
Junction Temperature
Tj
- 40 to +150
˚C
Storage Temperature
Tstg
- 40 to +150
˚C
*1 FR-4 114.3 mm × 76.2 mm × 1.6 mm 4 layer :
4
EIA/JEDEC
CXA3840WR
Recommended Operating Conditions
Parameter
Symbol
Min.
Typ.
Max.
Unit
7
12
25
V
Power Supply Voltage
VIN
SW Inductor
L1
3.9
10
18
μH
SW Output Capacitor
COSW
22
47
100
μF
Phase Compensate Capacitor
CFB
24
27
30
pF
SW Feedback Resister1
R1
30
33
36
kΩ
SW Feedback Resister2
R2
135
150
165
kΩ
LDO1 Output Capacitor
COV1
10
22
―
μF
LDO2 Output Capacitor
COV2
6.8
10
―
μF
LDO3 Output Capacitor
COV3
6.8
10
―
μF
LDO4 Output Capacitor
COVH
1
2.2
―
μF
LDO5 Output Capacitor
COVL
1
2.2
―
μF
Typical Application
VIN 7 to 25 V ( typ. 12 V )
GND
Power GND
VH
COSW
L2
COVH
L1
R2
RLDO
1.2 V
RDH
23
22
21
20
19
VH_IN
24
VH
1 FB
(Top view)
VSEL1
2 LDO_IN1
CVH_IN
18
DP4
DP3
DP2
CCP4
CCP3
CCP2
5 V or 3.3 V
/ 0V
C1P 17
3 Vo1
C1N 16
PAD
( )
COV1
3.3 V(A)
DP5
CVIN2
SW
R1
DOSW
5 V or 3.3 V
/ 0V
VSEL2
CFB
CVIN1
VIN
COUT
NC
5.0 V
4 Vo2
PGND 15
COV2
5 LDO_IN2
C2P 14
6 Vo3
C2N 13
GND
VCP
R3
VL_IN
R4
VL
COV3
VM1
3.3 V(D)
VM2
CLDO_IN2
7
8
9
10
11
12
XRST2
CCN3
CCN2
CCN1
DN3
DN2
DN1
CVCP
XRST1
CVL_IN
VL
COVL
5
RDN
DN4
DP1
CCP1
CXA3840WR
Electrical Characteristics
Ta = 25 ˚C, VVIN = 12 V unless otherwise noted.
1.
Current Consumption (VIN)
Parameter
Current Consumption
2.
Symbol
Conditions
VIN = 12 V, FB = 0.7 V,
VCP = VLDO_IN1 = VLDO_IN2 = 5 V
VVH_IN = 22 V, VVL_IN = -13 V
VO1 to VO3,VH,VL = no load
CCP1 to 5,CCN1 to 4 = no load
IQ = IVIN+ IVCP+ ILDO_IN1+
I LDO_IN2+ IVH_IN+ IVL_IN
IQ
Min.
Typ.
Max.
Unit
―
6
10
mA
Charge Pump Circuit
VVCP = 5 V, fTCP = 31 kHz, CCP1 to 5, CVH_IN, CCN1 to 4, CVL_IN = 10 μF, SBD:CRS03 or equivalent, unless otherwise
noted.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
UVLO Release Voltage
VT_ON_CP
VVCP L→H
2.8
3.3
3.8
V
UVLO Detect Voltage
VT_OFF_CP
VVCP H→L
2.6
3.1
3.6
V
RDSH
IOC1P,IOC2P,IOC1N,IOC2N = -100 mA
0.5
1
2
Ω
RDSL
IOC1P,IOC2P,IOC1N,IOC2N = 100 mA
0.5
1
2
Ω
Timing Frequency
fTCP
No load
27
31
35
kHz
Soft Start Time
Tss_cp
―
70
―
ms
High-side Transistor
On Resistance
Low-side Transistor
On Resistance
―
ΔVVH_IN/ΔIO_CH
IO_CP = 10 to 20 mA
―
60
―
V/A
ΔVVL_IN/ΔIO_CN
IO_CN = 10 to 20 mA
―
45
―
V/A
VVH_IN
IO_CP = 40 mA
―
22
―
V
VVL_IN
IO_CN = 30 mA,
―
- 13
―
V
Output Impedance
Output Voltage
6
CXA3840WR
3.
Switching Regulator
Ta = 25 ˚C, VVIN = 12 V unless otherwise noted.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
6.4
6.6
6.8
V
6.15
6.35
6.55
V
200
250
―
mV
[ UVLO ]
UVLO Release Voltage
VT_ON
VIN = L → H
UVLO Detect Voltage
VT_OFF
VIN = H → L
Hysteresis
VHYS
―
[ Soft Start ]
Soft Start Time
Tss
VFB = 0.85 V
2
4
8
ms
Switching Frequency1
fOSC
VFB = 0.8 V
900
1000
1100
kHz
Switching Frequency2
fOSC_LOW
VFB = 0.4 V
290
333
450
kHz
Frequency variability (VIN)
fDV
VVIN = 7 to 25 V
―
1
―
%
Ta = -20 to +75 ˚C
―
5
―
%
[ Oscillator ]
Frequency variability (Temp.) fDT
[ Error Amplifier ]
Reference Voltage
VB
―
- 3.0 %
0.9
+ 3.0 %
V
Input Bias Current
IB
―
-0.1
―
0.1
μA
VB Output Voltage
Line Regulation
VB Output Voltage
Temperature Coefficient
[ PWM Comparator ]
ΔVB
VVIN = 7 to 25 V
―
0.2
―
mV
ΔVB / Ta
Ta = -20 to +75 ˚C
―
±50
―
p-pm/
˚C
Maximum Duty Cycle
MaxDuty
VFB = 0.8 V
85
90
―
%
Minimum On Time
tON_min
―
150
190
ns
―
0.45
0.7
Ω
1.6
2.0
2.4
A
―
―
1
μA
―
[ SW Output ]
Output On Resistance
RON
SW Current Limitation
ILIM
SW Leak Current
ILEAK
[ Thermal Shut Down ]
Thermal Shut Down
Detection Temperature
Thermal Shut Down
Release Temperature
ISW = 1 A
―
VVIN = 28 V, VSW = 0 V
TTSD
―
―
168
―
˚C
TTSR
―
―
155
―
˚C
7
CXA3840WR
4.
LDO 1
VLDO_IN1 = VLDO_IN2 = 5 V
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
- 2.0 %
1.2
+ 2.0 %
V
400
800
―
mA
Output Voltage
VO1
IO1 = 200 mA
Output Current
IO1
VO1 × 0.9
Load Regulation
ΔVO1 / IO1
IO1 = 1 to 400 mA
―
0.0025
0.0075
%/mA
Ripple Rejection
RR1
―
45
―
dB
Dropout Voltage
ΔVIO1
Ein = 50 mVrms , f = 1 kHz,
IO1 = 200 mA
IO1 = 400 mA
―
0.4
0.8
V
―
p-pm/
˚C
Output Voltage
Temperature Coefficient
5.
ΔVO1 / Ta
Ta = -20 to +75 ˚C, IO1 = 200 mA
―
± 50
LDO 2
VLDO_IN1 = VLDO_IN2 = 5 V
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
- 1.5 %
3.3
+ 1.5 %
V
150
300
―
mA
IO2 = 1 to 150 mA
―
0.005
0.014
%/mA
RR2
Ein = 50 mVrms , f = 1 kHz,
IO2 = 100 mA
―
45
―
dB
ΔVIO2
IO2 = 150 mA
―
0.4
0.8
V
―
p-pm/
˚C
Output Voltage
VO2
IO2 = 100 mA
Output Current
IO2
VO2 × 0.9
Load Regulation
ΔVO2 / IO2
Ripple Rejection
Dropout Voltage
Output Voltage
Temperature Coefficient
6.
ΔVO2 / Ta
Ta = -20 to +75 ˚C / IO2 = 100 mA
―
± 50
LDO 3
VLDO_IN1 = VLDO_IN2 = 5 V
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
- 1.5 %
3.3
+ 1.5 %
V
250
500
―
mA
IO3 = 1 to 250 mA
―
0.003
0.009
%/mA
RR3
Ein = 50 mVrms , f = 1 kHz,
IO3 = 150 mA
―
45
―
dB
ΔVIO3
IO3 = 250 mA
―
0.4
0.8
V
―
p-pm/
˚C
Output Voltage
VO3
IO3 = 150 mA
Output Current
IO3
VO3 × 0.9
Load Regulation
ΔVO3 / IO3
Ripple Rejection
Dropout Voltage
Output Voltage
Temperature Coefficient
ΔVO3 / Ta
Ta = -20 to +75 ˚C / IO3 = 150 mA
8
―
± 50
CXA3840WR
7.
Voltage Monitor
Parameter
Threshold Voltage
(Detection)
Threshold Voltage
(Release)
Symbol
Conditions
Min.
Typ.
Max.
Unit
VDET
Vo2,Vo3 increasing
3.00
3.05
3.10
V
VREL
Vo2,Vo3 decreasing
3.04
3.11
3.18
V
20
60
100
mV
―
Threshold Difference
|VDET -VREL|
Threshold Voltage
Temperature Coefficient
ΔVDET / Ta
Ta = -20 to +75 ˚C
―
±50
―
p-pm/
˚C
Delay Time 1
td1
VVH = ON → VM1 = H
4
5
―
ms
Delay Time 2
td2
VM1 = H → VM2 = H
1
1.5
―
ms
Leak Current
ILEAK_VM
VM1 = VM2 = 5 V
0
0.5
1.0
μA
Output Current
IOUT
VM1 = VM2 = 0.5 V
4
7
―
mA
Min.
Typ.
Max.
Unit
or
- 1.5 %
12
+ 1.5 %
V
or
- 1.5 %
15
+ 1.5 %
V
8.
LDO 4
VH_IN = 22 V
Parameter
Symbol
Conditions
IVH = 2 0 mA
VSEL1 = L, VSEL2 = L
VSEL1 = H, VSEL2 = H
IVH = 20 mA
VSEL1 = H, VSEL2 = L
VSEL1 = L, VSEL2 = H
Output Voltage
VVH1
Output Voltage
VVH2
Output Current
IVH
VVH × 0.9
40
85
―
mA
Load Regulation
ΔVVH / IVH
IVH = 1 to 40 mA
―
0.005
0.015
%/mA
Ripple Rejection
RR4
Ein = 50 mVrms , f = 1 kHz, IVH = 20 mA
―
60
―
dB
Dropout Voltage
Output Voltage
Temperature Coefficient
OFF period
Output Resistance
ΔVIVH
IVH = 40 mA
―
0.5
1.0
ΔVVH / Ta
Ta = -20 to + 75 ˚C / IVH = 200 mA
―
±70
―
V
p-pm/
˚C
RO_OFF4
VVIN = 0 V, VH_IN = 22 V
80
150
300
Ω
Min.
Typ.
Max.
Unit
- 3.0 %
-5
+ 3.0 %
V
- 3.0 %
-7
+ 3.0 %
V
- 3.0 %
- 7.5
+ 3.0 %
V
30
75
―
mA
9.
LDO 5
VL_IN = -13 V
Parameter
Symbol
Conditions
Output Voltage
VVL1
Output Voltage
VVL2
Output Voltage
VVL3
Output Current
IVL
IVL = 15 mA
VSEL1 = L, VSEL2 = L
IVL = 15 mA
VSEL1 = H, VSEL2 = L or
VSEL1 = H, VSEL2 = H
IVL = 15 mA
VSEL1 = L, VSEL2 = H
VVL × 0.9
Load Regulation
ΔVVL / IVL
IVL = 1 to 30 mA
―
0.01
0.02
%/mA
Ripple Rejection
RR5
Ein = 50 mVrms , f = 1 kHz,
IVL = 15 mA
―
35
―
dB
Dropout Voltage
ΔVIVL
IVL = 30 mA
―
0.3
0.6
V
Output Voltage
Temperature Coefficient
OFF period
Output Resistance
ΔVVL / Ta
Ta = -20 to + 75 ˚C / IVL = 15 mA
RO_OFF5
VVIN = 0 V, VL_IN = -13 V
9
―
± 70
―
p-pm/
˚C
100
200
400
Ω
CXA3840WR
10. Voltage Selector
VH_IN = 22 V,
VL_IN = -13 V
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
VSEL1_L
VSEL1_H
―
0
―
0.5
V
VSEL1 terminal High
―
1.6
―
―
V
VSEL2 terminal Low
VSEL2_L
―
0
―
0.5
V
VSEL2 terminal High
VSEL2_H
―
1.6
―
―
V
VSEL1 terminal Low
11. VH and VL Output Voltage Settings
Parameter
Voltage selector settings
VVH
VVL
Unit
Voltage Setting 1
VSEL1 = L, VSEL2 = L
12
- 5.0
V
Voltage Setting 2
VSEL1 = H, VSEL2 = L
15
- 7.0
V
Voltage Setting 3
VSEL1 = L, VSEL2 = H
15
- 7.5
V
Voltage Setting 4
VSEL1 = H, VSEL2 = H
12
- 7.0
V
10
CXA3840WR
Sequence
1.
Start-up
VT_ON
VIN
Buck converter
output voltage VT_ON_CP
( VCP)
TSS
1.0 V (typ.)
VO1
(1.2 V)
3.11 V (typ.)
VO2
(3.3 V)
3.11 V (typ.)
VO3
(3.3 V)
VM1
td1
VM2
>0
td2
VH_IN
TSS_CP
VH
VL_IN
VL
11
CXA3840WR
2.
Stop
VT_OFF
VIN
Buck converter
output voltage
( VCP)
VO1
(1.2 V)
VO2
(3.3 V)
3.05 V (typ.)
VO3
(3.3 V)
3.05 V (typ.)
VM1
VM2
VH_IN
VH
>0
VL_IN
>0
VL
12
CXA3840WR
3.
Thermal shut down and recovery
VIN
TTSD
TTSR
TEMP
Buck converter
Output voltage
( VCP)
VT_ON_CP
TSS
VO1
(1.2 V)
1.0 V (typ.)
VO2
(3.3 V)
3.05 V (typ.)
3.11 V (typ.)
VO3
(3.3 V)
3.05 V (typ.)
3.11 V (typ.)
VM1
td1
>0
VM2
td2
VH_IN
TSS_CP
VH
>0
VL_IN
>0
VL
13
CXA3840WR
Pin Configuration
(TOP VIEW)
Pin Description
Pin
Symbol
Function
1
FB
2
LDO_IN1
LDO1 Input Voltage
3
Vo1
1.2 V Output Voltage
4
Vo2
3.3 V Output Voltage for Digital circuit
5
LDO_IN2
6
Vo3
3.3 V Output Voltage for Analog circuit
7
VM2
Voltage Monitor Output 2 ( Open Drain )
8
VM1
Voltage Monitor Output 1 ( Open Drain )
9
VL
10
VL_IN
Low Voltage Input
11
GND
GND
12
VCP
Voltage Input for Charge pump
13
C2N
Charge Pump Output2 N
14
C2P
Charge Pump Output2 P
15
PGND
16
C1N
Charge Pump Output1 N
17
C1P
Charge Pump Output1 P
18
VSEL1
VH/VL Output Voltage Selector 1
19
VH_IN
High Voltage Input
20
VH
High Voltage (12 V/15 V) Output
21
VIN
Supply voltage
22
NC
23
SW
24
VSEL2
PAD
PAD
Feedback Voltage
LDO2/3 Input Voltage
Low Voltage (- 5.0 / - 7.0 / - 7.5 V) Output
GND
―
Switch Output
VH/VL Output Voltage Selector 2
NC (PAD should be connected to GND for heat radiation.)
14
CXA3840WR
Package Outline
15
CXA3840WR
Marking
A3840
16
CXA3840WR
Note
Sony reserves the right to change products and specifications without prior notice.
This information does not convey any license by any implication or otherwise under any patents or other right.
Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume
responsibility for any problems arising out of the use of these circuits.
17
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