ANALOG DEVICES ADP1882 Service Manual

Synchronous Current-Mode with

V

Constant On-Time, PWM Buck Controller

FEATURES

Power input voltage as low as 2.75 V to 20 V Bias supply voltage range: 2.75 V to 5.5 V Minimum output voltage: 0.8 V

0.8 V reference voltage with ±1.0% accuracy Supports all N-channel MOSFET power stages Available in 300 kHz, 600 kHz, and 1.0 MHz options No current-sense resistor required Power saving mode (PSM) for light loads (ADP1883 only) Resistor-programmable current-sense gain Thermal overload protection Short-circuit protection Precision enable input Integrated bootstrap diode for high-side drive 140 μA shutdown supply current Starts into a precharged load Small, 10-lead MSOP package

APPLICATIONS

Telecom and networking systems Mid to high end servers Set-top boxes DSP core power supplies

R

TOP

OUT

VDD= 2.75V TO 5.5V

100

95 90 85 80 75 70 65 60 55

EFFICIENCY (%)

50 45 40 35 30 25

100 1k 10k 100k

Figure 2. ADP1882/ADP1883 Efficiency vs. Load Current

ADP1882/ADP1883

TYPICAL APPLICATIONS CIRCUIT

= 2.75V TO 2 0

IN

C

C2

R

C

R

BOT

C

VDD2

C

VDD

VIN

ADP1882/

ADP1883

COMP/EN BST

FB DRVH

GND SW

VDD DRVL

PGND

C

BST

R

RES

Figure 1.

VDD = 5.5V, VIN = 13.0V V

= 5.5V, VIN = 16.5V

DD

VDD = 5.5V, VIN = 5.5V (PSM) V

= 5.5V, VIN = 5.5V

DD

V

= 3.6V, VIN = 5.5V

DD

TA = 25°C V

= 1.8V

OUT

f

= 300kHz

SW

WURTH INDUCTO R: 744325120, L = 1. 2µH, DCR = 1.8m

INFINEON MOSFETs: BSC042N03MS G (UPPER/LOWER)

LOAD CURRENT (mA)

= 1.8 V, 300 kHz)

(V

OUT

C

IN

Q1

L

C

OUT

Q2

V

LOAD

OUT

08901-001

08901-002

GENERAL DESCRIPTION

The ADP1882/ADP1883 are versatile current-mode, synchronous step-down controllers that provide superior transient response, optimal stability, and current-limit protection by using a constant on-time, pseudo-fixed frequency with a programmable currentlimit, current-control scheme. In addition, these devices offer optimum performance at low duty cycles by using valley currentmode control architecture. This allows the ADP1882/ADP1883 to drive all N-channel power stages to regulate output voltages as low as 0.8 V.

The ADP1883 is the power saving mode (PSM) version of the device and is capable of pulse skipping to maintain output regulation while achieving improved system efficiency at light loads (see the Power Saving Mode (PSM) Version (ADP1883) section for more information).

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. Specifications subject to change without notice. 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 owners.

Available in three frequency options (300 kHz, 600 kHz, and

1.0 MHz, plus the PSM option), the ADP1882/ADP1883 are well suited for a wide range of applications. These ICs not only operate from a 2.75 V to 5.5 V bias supply, but they also can accept a power input as high as 20 V.

In addition, an internally fixed soft start period is included to limit input in-rush current from the input supply during startup and to provide reverse current protection during soft start for a precharged output. The low-side current-sense, current-gain scheme and integration of a boost diode, along with the PSM/forced pulse-width modulation (PWM) option, reduce the external part count and improve efficiency.

The ADP1882/ADP1883 operate over the −40°C to +125°C junction temperature range and are available in a 10-lead MSOP.

ADP1882/ADP1883

REVISION HISTORY

4/10—Revision 0: Initial Version

Rev. 0 | Page 2 of 40

ADP1882/ADP1883

SPECIFICATIONS

All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC). VDD = 5 V, BST − SW = 5 V, V

= 13 V. The specifications are valid for TJ = −40°C to +125°C, unless otherwise specified.

IN

Table 1.

Parameter Symbol Conditions Min Typ Max Unit

POWER SUPPLY CHARACTERISTICS

High Input Voltage Range VIN ADP1882ARMZ-0.3/ADP1883ARMZ-0.3 (300 kHz) 2.75 12 20 V ADP1882ARMZ-0.6/ADP1883ARMZ-0.6 (600 kHz) 2.75 12 20 V ADP1882ARMZ-1.0/ADP1883ARMZ-1.0 (1.0 MHz) 3.0 12 20 V Low Input Voltage Range VDD C ADP1882ARMZ-0.3/ADP1883ARMZ-0.3 (300 kHz) 2.75 5 5.5 V ADP1882ARMZ-0.6/ADP1883ARMZ-0.6 (600 kHz) 2.75 5 5.5 V ADP1882ARMZ-1.0/ADP1883ARMZ-1.0 (1.0 MHz) 3.0 5 5.5 V Quiescent Current I Shutdown Current I

Q_DD

DD, SD

+ I

Q_BST

BST, SD

Undervoltage Lockout UVLO Rising VDD (see Figure 35 for temperature variation) 2.65 V UVLO Hysteresis Falling VDD from operational state 190 mV

SOFT START

Soft Start Period See Figure 58 3.0 ms

ERROR AMPLIFIER

FB Regulation Voltage VFB T T T Transconductance GM 300 520 730 μs FB Input Leakage Current I

FB = 0.8 V, COMP/EN = released 1 50 nA

FB, LEAK

CURRENT-SENSE AMPLIFIER GAIN

Programming Resistor (RES)

RES = 47 kΩ ± 1% 2.98 3.4 3.7 V/V

Value from DRVL to PGND RES = 22 kΩ ± 1% 6 6.6 7.4 V/V RES = none 24.1 26.7 29.3 V/V RES = 100 kΩ ± 1% 12.1 13.4 14.7 V/V

SWITCHING FREQUENCY

ADP1882ARMZ-0.3/

300 kHz

ADP1883ARMZ-0.3 (300 kHz)

On Time VIN = 5 V, V

Minimum On Time VIN = 20 V 145 190 ns

Minimum Off Time 84% duty cycle (maximum) 340 400 ns ADP1882ARMZ-0.6/

600 kHz

ADP1883ARMZ-0.6 (600 kHz)

On Time VIN = 5 V, V Minimum On Time VIN = 20 V, V Minimum Off Time 65% duty cycle (maximum) 340 400 ns

ADP1882ARMZ-1.0/

1.0 MHz

ADP1883ARMZ-1.0 (1.0 MHz)

On Time VIN = 5 V, V Minimum On Time VIN = 20 V 60 85 ns Minimum Off Time 45% duty cycle (maximum) 340 400 ns

= 1 μF to PGND, CIN = 0.22 μF to GND

IN

FB = 1.5 V, no switching 1.1 mA

COMP/EN < 285 mV 140 215 μA

= 25°C 800 mV

J

= −40°C to +85°C 795.3 800 805.5 mV

J

= −40°C to +125°C 792.8 800 808.0 mV

J

Typical values measured at 50% time points with 0 nF at DRVH and DRVL; maximum values are guaranteed by bench evaluation

= 2 V, TJ = 25°C 1115 1200 1285 ns

OUT

= 2 V, TJ = 25°C 490 540 585 ns

OUT

= 0.8 V 82 110 ns

OUT

= 2 V, TJ = 25°C 280 312 340 ns

OUT

1

Rev. 0 | Page 3 of 40

ADP1882/ADP1883

Parameter Symbol Conditions Min Typ Max Unit

OUTPUT DRIVER CHARACTERISTICS

High-Side Driver

Output Source Resistance I Output Sink Resistance I Rise Time Fall Time

2

t

2

t

BST − SW = 4.4 V, CIN = 4.3 nF (see Figure 60) 25 ns

R, DRVH

BST − SW = 4.4 V, CIN = 4.3 nF (see Figure 61) 11 ns

F, D RV H

Low-Side Driver

Output Source Resistance I Output Sink Resistance I

2

Rise Time Fall Time

2

t

V

R, DRVL

V

F, D RV L

Propagation Delays

DRVL Fall to DRVH Rise DRVH Fall to DRVL Rise

SW Leakage Current I

2

t t

BST − SW = 4.4 V (see Figure 60) 22 ns

TPDH, DRVH

BST − SW = 4.4 V (see Figure 61) 24 ns

TPDH, DRVL

BST = 25 V, SW = 20 V, VDD = 5.5 V 110 μA

SW, LEAK

Integrated Rectifier

Channel Impedance I

PRECISION ENABLE THRESHOLD

Logic High Level VIN = 2.75 V to 20 V, VDD = 2.75 V to 5.5 V 235 285 330 mV Enable Hysteresis VIN = 2.75 V to 20 V, VDD = 2.75 V to 5.5 V 35 mV

COMP VOLTAGE

COMP Clamp Low Voltage V

COMP Clamp High Voltage V COMP Zero Current Threshold V

THERMAL SHUTDOWN T

COMP(LOW )

2.75 V ≤ VDD ≤ 5.5 V 2.55 V

COMP(H IGH)

2.75 V ≤ VDD ≤ 5.5 V 0.95 V

COMP_ZC T

TMSD

Thermal Shutdown Threshold Rising temperature 155 °C Thermal Shutdown Hysteresis 15 °C Hiccup Current Limit Timing 6 ms

1

The maximum specified values are with the closed loop measured at 10% to 90% time points (see and , C

MOSFETs specified as Infineon BSC042N030MSG.

2

Not automatic test equipment (ATE) tested.

= 1.5 A, 100 ns, positive pulse (0 V to 5 V) 2 3.5 Ω

SOURCE

= 1.5 A, 100 ns, negative pulse (5 V to 0 V) 0.8 2 Ω

SINK

= 1.5 A, 100 ns, positive pulse (0 V to 5 V) 1.7 3 Ω

SOURCE

= 1.5 A, 100 ns, negative pulse (5 V to 0 V) 0.75 2 Ω

SINK

= 5.0 V, CIN = 4.3 nF (see Figure 61) 18 ns

DD

= 5.0 V, CIN = 4.3 nF (see Figure 60) 16 ns

DD

= 10 mA 22 Ω

SINK

From disable state, release COMP/EN pin to enable device; 2.75 V ≤ V

≤ 5.5 V

DD

Figure 60 Figure 61)

0.47 V

= 4.3 nF, and the upper-side and lower-si

GATE

de

Rev. 0 | Page 4 of 40

ADP1882/ADP1883

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

VDD to GND −0.3 V to +6 V VIN to PGND −0.3 V to +28 V FB, COMP/EN to GND −0.3 V to (VDD + 0.3 V) DRVL to PGND −0.3 V to (VDD + 0.3 V) SW to PGND −2.0 V to +28 V BST to SW −0.8 V to (VDD + 0.3 V) BST to PGND −0.3 V to 28 V DRVH to SW −0.3 V to VDD PGND to GND

θJA (10-Lead MSOP)

2-Layer Board 213.1°C/W

4-Layer Board 171.7°C/W Operating Junction Temperature Range −40°C to +125°C Storage Temperature Range −65°C to +150°C Soldering Conditions JEDEC J-STD-020 Maximum Soldering Lead Temperature

(10 sec)

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Absolute maximum ratings apply individually only, not in combination. Unless otherwise specified, all other voltages are referenced to PGND.

±0.3 V

300°C

THERMAL RESISTANCE

θJA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages.

Table 3. Thermal Resistance

Package Type θ

θJA (10-Lead MSOP)

2-Layer Board 213.1 °C/W 4-Layer Board 171.7 °C/W

1

θJA is specified for the worst-case conditions; that is, θJA is specified for device

soldered in a circuit board for surface-mount packages.

1

Unit

JA

BOUNDARY CONDITION

In determining the values given in Ta b le 2 and Tabl e 3, natural convection was used to transfer heat to a 4-layer evaluation board.

ESD CAUTION

Rev. 0 | Page 5 of 40

ADP1882/ADP1883

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

VIN

1

ADP1882/

FB GND VDD

2

ADP1883

3

TOP VIEW

4

(Not to S cale)

5

COMP/EN

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1 VIN High Input Voltage. Connect VIN to the drain of the upper-side MOSFET. 2 COMP/EN Output of the Internal Error Amplifier/IC Enable. When this pin functions as EN, applying 0 V to this pin disables the IC. 3 FB Noninverting Input of the Internal Error Amplifier. This is the node where the feedback resistor is connected. 4 GND

Analog Ground Reference Pin of the IC. All sensitive analog components should be connected to this ground plane (see the Layout Considerations section).

5 VDD

Bias Voltage Supply for the ADP1882/ADP1883 Controller, Including the Output Gate Drivers. A bypass capacitor of 1 μF directly from this pin to PGND and a 0.1 μF across VDD and GND are recommended.

6 DRVL

Drive Output for the External Lower-Side N-Channel MOSFET. This pin also serves as the current-sense gain

setting pin (see Figure 69). 7 PGND Power GND. Ground for the lower-side gate driver and lower-side N-channel MOSFET. 8 DRVH Drive Output for the External Upper-Side, N-Channel MOSFET. 9 SW Switch Node Connection. 10 BST

Bootstrap for the Upper-Side MOSFET Gate Drive Circuitry. An internal boot rectifier (diode) is connected

between VDD and BST. A capacitor from BST to SW is required. An external Schottky diode can also be

connected between VDD and BST for increased gate drive capability.

BST

10

9

SW

8

DRVH PGND

7

DRVL

6

08901-003

Rev. 0 | Page 6 of 40

ADP1882/ADP1883

TYPICAL PERFORMANCE CHARACTERISTICS

100

VDD = 5.5V, VIN = 5.5V (PSM)

95

V

= 5.5V, VIN = 13V (PSM )

DD

90

VDD = 5.5V, VIN = 5.5V

85 80 75 70 65 60 55

EFFICIENCY (%)

50 45 40 35 30

100 1k 10k 100k

V

DD

VDD = 3.6V, VIN = 5.5V (PSM)

WURTH IND: 744355147, L = 0.47 µH, DCR: 0.80M INFENION FETs: BSC042N03MS G ( UPPER/LOWER) TA = 25°C

= 5.5V,

V

DD

V

= 13V

IN

(PSM)

= 5.5V, VIN = 16.5V ( PSM)

DD

= 3.6V, VIN = 16.5V (PSM)

VDD = 3.6V, V

= 13V

IN

(PSM)

LOAD CURRENT (mA)

Figure 4. Efficiency—300 kHz, V

OUT

= 0.8 V

08901-004

100

95

VDD = 5.5V, V

= 13V (PSM)

90

IN

85 80 75 70 65 60 55 50

EFFICIE NCY ( %)

45 40 35

VDD = 3.6V, VIN = 5.5V

30 25 20 15

100 100k10k1k

Figure 7. Efficiency—600 kHz, V

VDD = 5.5V, VIN = 5.5V (PSM)

VDD = 5.5V, VIN = 13V

VDD = 5.5V, VIN = 16.5V

WURTH INDUCTOR: 744355072, L = 0.72µH, DCR: 1.65m INFINEON FETS: BSC042N03MS G (UPPER/LOWER) R

: 5.4m

ON

T

= 25°C

A

VDD = 5.5V, VIN = 5.5V

= 5.5V, VIN = 16.5V ( PSM)

V

DD

LOAD CURRENT (mA)

= 0.8 V

OUT

08901-007

100

95

VDD = 5.5V, VIN = 5.5V

VDD = 5.5V, VIN = 5.5V (PSM)

90 85 80 75

VDD = 5.5V, V

= 13V

IN

VDD = 5.5V, VIN = 16.5V

VDD = 5.5V, VIN = 13V (PSM)

VDD = 5.5V, VIN = 16.5V (PSM)

70 65

VDD = 3.6V, VIN = 5.5V

60 55

EFFICIENCY (%)

50 45 40 35 30 25

100 1k 10k 100k

WURTH INDUCTOR: 7443252100, L = 1.0µH, DCR: 3.3m INFINEON M OSFETS: BSC042N03MS G (UPPER/ LOWER) R

: 5.4m

ON

T

= 25°C

A

LOAD CURRENT (mA)

Figure 5. Efficiency—300 kHz, V

100

VDD = 5.5V, VIN = 16.5V (PSM)

95

OUT

= 1.8 V

90 85

VDD = 2.7V, VIN = 16.5V (PSM)

80 75 70 65 60 55

EFFICIENCY (%)

50 45 40 35 30

100 1k 10k 100k

VDD = 2.7V, VIN = 13V

VDD = 5.5V, VIN = 13V

VDD = 3.6V, VIN = 13V

VDD = 5.5V, VIN = 16.5V VDD = 3.6V, VIN = 16.5V

TA = 25°C V

OUT

F

SW

WURTH INDUCTOR: 744355200, L = 2µH, DCR: 2.5m INFINEON M OSFETS: BSC042N03MS G (UPPER/LOWER)

= 1.8V

= 300kHz

LOAD CURRENT (mA)

Figure 6. Efficiency—300 kHz, V

OUT

= 7 V

100

VDD = 5.5V, VIN = 5.5V

95 90 85 80 75 70 65 60 55

EFFICIENCY (%)

50 45 40 35 30 25

100 1k 10k 100k

8901-005

VDD = 5.5V, VIN = 13V

WURTH INDUCTOR: 744325072, L = 0.72µH, DCR: 1.65m INFINEON FETS: BSC042N03MS G ( UPPER/LO W ER) R T

VDD = 5.5V, VIN = 16.5V (PSM)

VDD = 5.5V, VIN = 13V (PSM)

VDD = 5.5V, VIN = 16.5V

: 5.4m

ON

= 25°C

A

LOAD CURRENT (mA)

Figure 8. Efficiency—600 kHz, V

100

VDD = 5.5V/VIN = 13V (PSM)

VDD = 3.6V, VIN = 5.5V

VDD = 5.5V, VIN = 5.5V (PSM)

= 1.8 V

OUT

8901-008

95

90

VDD = 3.6V/VIN = 13V

85

80

VDD = 5.5V/VIN = 16.5V

75

= 5.5V/VIN = 13V

V

70

EFFICIENCY (%)

65

60

55

50

100 1k 10k 100k

8901-006

DD

TA = 25°C V

= 5V, VIN = 13V

OUT

F

= 600kHz

SW

WURTH INDUCT OR: 7443552100, L = 1.0µH, DCR: 3.3m INFINEON MOSFETS: BSC042N03MS G (UPPER/LOWER)

LOAD CURRENT (mA)

Figure 9. Efficiency—600 kHz, V

OUT

= 5 V

901-009 08

Rev. 0 | Page 7 of 40

ADP1882/ADP1883

T

100

VDD = 5.5V/VIN = 5.5V (PSM)

95 90

VDD = 3.6V/VIN = 3.6V

V

= 5.5V/VIN = 5.5V

DD

85 80 75 70 65 60 55 50

EFFICIENCY (%)

45 40 35 30 25 20

100 1k 10k 100k

VDD = 5.5V/VIN = 16.5V

VDD = 5.5V/VIN = 13V

TA = 25°C V

OUT

F

SW

WURTH INDUCTOR: 744303022, L = 0.22µH, DCR: 0.33m INFINEON M OSFETS: BSC042N03MS G ( UPPER/LOWER)

VDD = 3.6V/VIN = 13V

= 0.8V, VIN = 5.5V

= 1MHz

LOAD CURRENT (mA)

100

VDD = 5.5V/VIN = 5.5V (PSM)

95 90

Figure 10. Efficiency—1.0 MHz, V

VDD = 5.5V/VIN = 5.5V

= 0.8 V

OUT

VDD = 5.5V/VIN = 13V

85 80 75 70 65 60

VDD = 3.6V/VIN = 13V

VDD = 3.6V/VIN = 16.5V

VDD = 5.5V/VIN = 16.5V

55 50

EFFICIENCY (%)

45 40 35 30 25 20

100

1k 10k 100k

TA = 25°C V

= 1.8V, VIN = 5.5V

OUT

F

= 1MHz

SW

WURTH INDUCTOR: 744303022, L = 0.22µH, DCR: 0.33m INFINEON M OSFETS: BSC042N03MS G (UPPER/LOWER)

LOAD CURRENT (mA)

Figure 11. Efficiency—1.0 MHz, V

OUT

= 1.8 V

100

95

VDD = 5.5V/VIN = 16.5V (PSM)

90 85 80 75 70 65 60 55

EFFICIENCY (%)

50 45 40 35 30

100 1k 10k

VDD = 5.5V/VIN = 16.5V

VDD = 5.5V/VIN = 13V

= 25°C

T

A

V

= 4V, VIN = 16.5V

OUT

F

= 1MHz

SW

WURTH INDUCTOR: 744318180, L = 1.4µH, DCR: 3.2m INFINEON M OSFETS: BSC042N03MS G ( UPPER/LOWER)

LOAD CURRENT (mA)

Figure 12. Efficiency—1.0 MHz, V

OUT

= 4 V

08901-010

08901-011

08901-012

0.820

0.818

0.816

0.814

0.812

0.810

0.808

0.806

0.804

0.802

0.800

OUTPUT VOLTAGE (V)

0.798

0.796

0.794

0.792

0.790 0 2k 4k 6k 8k 10k 12k 14k 16k

V

= 5.5V VIN = 13V

IN

+125°C +25°C –40°C

VIN = 16.5V

LOAD CURRENT (mA)

Figure 13. Output Voltage Accuracy—300 kHz, V

OUT

1.809

1.804

AGE (V)

1.799

1.794

OUTPUT VOL

= 5.5V VIN = 13V

1.789

1.784

0 1.5k 3.0k 4.5k 6.0k 7.5k 9.0k 10.5k 12.0k 13.5k 15.0k

V

IN

+125°C +25°C –40°C

VIN = 16.5V

LOAD CURRENT (mA)

Figure 14. Output Voltage Accuracy—300 kHz, V

6.970

6.965

6.960

6.955

V

DD

V

IN

= 3.6V,

= 16.5V

+125°C +25°C –40°C

V V

DD

= 13V

IN

OUT

= 5.5V,

6.950

6.945

6.940

6.935

6.930

6.925

OUTPUT VOLTAGE (V)

6.920

V

= 5.5V,

DD

V

= 16.5V

6.915

6.910

6.905

IN

+125°C +25°C –40°C

0 1k2k3k4k5k6k7k8k9k10k

V V

DD IN

= 3.6V,

= 13V

+125°C +25°C –40°C

LOAD CURRENT (mA)

Figure 15. Output Voltage Accuracy—300 kHz, V

+125°C +25°C –40°C

= 0.8 V

+125°C +25°C –40°C

= 1.8 V

+125°C +25°C –40°C

= 7 V

OUT

08901-013

08901-014

08901-015

Rev. 0 | Page 8 of 40

ADP1882/ADP1883

0.829

0.827

0.825

0.823

0.821

0.819

0.817

0.815

0.813

0.811

0.809

0.807

0.805

OUTPUT VOLTAGE (V)

0.803

0.801

0.799

0.797

0.795

0 2k 4k0 6k 8k 10k 12k 14k

+125°C +25°C –40°C

= 16.5V VIN = 13VVIN = 16.5V

V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

+125°C +25°C –40°C

Figure 16. Output Voltage Accuracy—600 kHz, V

= 0.8 V

OUT

115

08901-

0.820

0.818

0.816

0.814

0.812

0.810

0.808

0.806

0.804

0.802

0.800

OUTPUT VOLTAGE (V)

0.798

0.796

0.794

0.792

0.790 0 2k4k6k8k10k12k

Figure 19. Output Voltage Accuracy—1.0 MHz, V

V

= 5.5V VIN = 13V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

+125°C +25°C –40°C

VIN = 16.5V

+125°C +25°C –40°C

= 0.8 V

OUT

08901-018

1.806

1.804

1.802

1.800

1.798

1.796

1.794

1.792

OUTPUT VOLTAGE (V)

1.790

1.788

1.786 0 1.5k 3.0k 4.5k 6.0k 7.5k 9.0k 10.5k 12.0k 13.5k 15.0k

V

= 5.5V VIN = 13V VIN = 16V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

+125°C +25°C –40°C

Figure 17. Output Voltage Accuracy—600 kHz, V

5.015

5.010

5.005

5.000

4.995

4.990

4.985

OUTPUT VOLTAGE (V)

4.980

4.975

4.970 01k2k3k4k5k6k7k

= 5.5V, VIN = 13V VDD = 5.5V, VIN = 16.5V

V

DD

+125°C +25°C –40°C

LOAD CURRENT (mA)

Figure 18. Output Voltage Accuracy—600 kHz, V

+125°C +25°C –40°C

= 1.8 V

OUT

+125°C +25°C –40°C

8k 9k 10k

= 5 V

OUT

1.808

1.806

1.804

1.802

1.800

1.798

1.796

1.794

1.792

1.790

OUTPUT VOLTAGE (V)

1.788

1.786

1.784

1.782

1.780 0 1.5k 3.0k 4.5k 6.0k 7.5k 9.0k 10.5k 12.0k 13.5k 15.0k

8901-016

Figure 20. Output Voltage Accuracy—1.0 MHz, V

4.060

4.055

4.050

4.045

4.040

4.035

4.030

4.025

4.020

OUTPUT VOLTAGE (V)

4.015

4.010

4.005

4.000 0 8.0k1.6k2.4k3.2k4.0k4.8k5.6k6.4k7.2k8.0k

08901-017

Figure 21. Output Voltage Accuracy—1.0 MHz, V

V

= 5.5V VIN = 13V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

V

LOAD CURRENT (mA)

IN

= 13V

+125°C +25°C –40°C

VIN = 16.5V

+125°C +25°C –40°C

= 1.8 V

OUT

VIN = 16.5V

+125°C +25°C –40°C

= 4 V

OUT

08901-019

08901-020

Rev. 0 | Page 9 of 4

0

ADP1882/ADP1883

T

0.804

0.803

0.802

0.801

AGE (V)

0.800

0.799

FEEDBACK VOL

0.798

0.797

0.796

VDD = 2.7V, VIN = 2.7/3.6V V

= 3.6V, VIN = 3.6V TO 16.5V

DD

V

= 5.5V, VIN = 5.5/13V/ 16. 5V

DD

–40.0 –7.5 25.0 57.5 90.0 122.5

TEMPERATURE (°C)

Figure 22. Feedback Voltage vs. Temperature

108901-02

1000

950

900

850

800

750

700

FREQUENCY (kHz )

650

V

= 3.6V

IN

600

550

10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2

+125°C +25°C –40°C

VIN = 5.5V

+125°C +25°C –40°C

VIN (V)

08901-024

Figure 25. Switching Frequency vs. High Input Voltage, 1.0 MHz, ±10% of 12 V

335 325 315 305 295 285 275 265

FREQUENCY (kHz )

255

V

= 3.6V

245 235 225

DD

+125°C +25°C –40°C

10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2

VDD = 5.5V

+125°C +25°C –40°C

VIN (V)

08901-022

Figure 23. Switching Frequency vs. High Input Voltage, 300 kHz, ±10% of 12 V

650

600

550

500

FREQUENCY ( kHz)

450

400

10.8 11.0 11.2 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.0 13.2

= 1.8V

V

OUT

+125°C +125°C +25°C –40°C

Figure 24. Switching Frequency vs. High Input Voltage, 600 kHz, V

VDD = 5.5V

+25°C –40°C

V

IN

(V)

OUT

08901-023

= 1.8 V,

±10% of 12 V

355 340 325 310 295 280 265 250

FREQUENCY ( kHz)

235

V

220 205 190

0 2k 4k 6k 8k 10k 12k 14k 16k

= 5.5V VIN = 13V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

+125°C +25°C –40°C

VIN = 16.5V

Figure 26. Frequency vs. Load Current, 300 kHz, V

380

V

= 5.5V

IN

370 360 350 340 330 320 310 300

FREQUENCY (kHz)

290 280 270 260

0

+125°C +25°C –40°C

V

2k 4k 6k 8k

LOAD CURRENT (mA)

= 13V

IN

+125°C +25°C –40°C

10k 12k

V

IN

= 16.5V

+125°C +25°C –40°C

14k

16k 18k

Figure 27. Frequency vs. Load Current, 300 kHz, V

OUT

+125°C +25°C –40°C

= 0.8 V

= 1.8 V

8901-025

20k

08901-026

Rev. 0 | Page 10 of 40

ADP1882/ADP1883

C

358 354 350 346 342 338 334 330

Y (kHz)

326 322 318 314

FREQUEN

310 306 302 298 294 290

0 0.8k1.6k2.4k3.2k4.0k4.8k5.6k6.4k7.2k8.0k8.8k9.6k

Figure 28. Frequency vs. Load Current, 300 kHz, V

700 670 640 610 580 550 520 490

Y (kHz)

460 430 400 370

FREQUEN

340 310 280 250 220 190

0 2k4k6k8k10k12k14k

V

= 5.5V VIN = 13V

IN

+125°C +25°C –40°C

Figure 29. Frequency vs. Load Current, 600 kHz, V

V

= 13V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

+125°C +25°C –40°C

LOAD CURRENT (mA)

VIN = 16.5V

+125°C +25°C –40°C

= 7 V

OUT

VIN = 16.5V

+125°C +25°C –40°C

= 0.8 V

OUT

708901-02

08901-028

750 742 734 726 718 710 702 694 686 678 670

FREQUENCY (kHz )

662 654 646 638 630

0 0.8k 1.6k 2.4k 3.2k 4.0k 4.8k 5.6k 6.4k 7.2k 8.0k 8.8k 9.6k

V

= 13V VIN = 16.5V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

Figure 31. Frequency vs. Load Current, 600 kHz, V

1300 1225 1150 1075 1000

925 850 775 700

FREQUENCY ( kHz)

625 550 475 400

0 2k4k6k8k10k12k

Figure 32. Frequency vs. Load Current, V

V

= 5.5V VIN = 13V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

+125°C +25°C –40°C

= 1.0 MHz, 0.8 V

OUT

VIN = 16.5V

+125°C +25°C –40°C

OUT

=5 V

+125°C +25°C –40°C

08901-030

08901-031

835 815 795 775 755 735 715 695 675 655 635 615

FREQUENCY (kHz )

595 575 555 535 515 495

V

= 5.5V

IN

+125°C +25°C –40°C

= 13V

V

IN

+125°C +25°C –40°C

VIN = 16.5V

+125°C +25°C –40°C

0 2k 4k 6k 8k 10k 12k 14k 16k 18k

LOAD CURRENT (mA)

Figure 30. Frequency vs. Load Current, 600 kHz, V

= 1.8 V

OUT

8901-029

1450 1375 1300 1225 1150

Y (kHz)

1075 1000

925

FREQUEN

850 775 700 625 550

0 2k 4k 6k 8k 10k 12k 14k 16k

V

= 5.5V VIN = 13V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

+125°C +25°C –40°C

Figure 33. Frequency vs. Load Current, 1.0 MHz, V

VIN = 16.5V

+125°C +25°C –40°C

= 1.8 V

OUT

08901-032

Rev. 0 | Page 11 of 40

ADP1882/ADP1883

1350

1300

1250

1200

1150

1100

1050

FREQUENCY (kHz )

1000

950

900

0 0.8k 1.6k 2.4k 3.2k 4.0k 4.8k 5.6k 6.4k 7.2k 8.0k

V

= 13V

IN

+125°C +25°C –40°C

LOAD CURRENT (mA)

VIN = 16.5V

Figure 34. Frequency vs. Load Current, 1.0 MHz, V

+125°C +25°C –40°C

OUT

08901-033

= 4 V

84 82 80 78 76 74 72 70 68 66 64 62 60 58 56 54 52

MAXIMUM DUTY CY CLE (%)

50 48 46 44 42 40

3.6 4.8 6.0 7.2 8.4 9.6 10.8 12.0 13.2 14.4 15.6

= 3.6V +125°C

V

DD

VDD = 5.5V

+25°C –40°C

VIN (V)

Figure 37. Maximum Duty Cycle vs. High Voltage Input (V

08297-036

)

IN

2.658

2.657

2.656

2.655

2.654

2.653

UVLO (V)

2.652

2.651

2.650

2.649 –40 120100806040200–20

TEMPERATURE ( °C)

Figure 35. UVLO vs. Temperature

100

95 90 85 80 75 70 65 60 55

MAXIMUM DUTY CY CLE (%)

50 45 40

300 400 500 600 700 800 900 1000

FREQUENCY (kHz)

VDD=2.7V VDD=3.6V VDD=5.5V

Figure 36. Maximum Duty Cycle vs. Frequency

+125°C +25°C –40°C

680

630

580

530

480

430

380

330

MINUMUM OFF TIME (ns)

280

230

180

–40 120100806040200–20

08901-034

V

= 2.7V

REG

= 3.6V

V

REG

V

= 5.5V

REG

TEMPERATURE (°C)

08901-037

Figure 38. Minimum Off Time vs. Temperature

680

630

580

530

480

430

380

330

MINUMUM OFF TIME (ns)

280

230

180

2.7 5.55.14.74.33.93.53.1

08901-035

VREG (V)

+125°C +25°C –40°C

08901-038

Figure 39. Minimum Off Time vs. VDD (Low Input Voltage)

Rev. 0 | Page 12 of 40

ANALOG DEVICES ADP1882 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

APPLICATIONS

TYPICAL APPLICATIONS CIRCUIT

GENERAL DESCRIPTION

TABLE OF CONTENTS

REVISION HISTORY

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

THERMAL RESISTANCE

BOUNDARY CONDITION

ESD CAUTION

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

TYPICAL PERFORMANCE CHARACTERISTICS